Speech Scrambler Detail Patents (Class 380/275)
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Patent number: 10516776Abstract: Embodiments of the present disclosure provide a volume adjusting method, system, apparatus and computer storage medium. In one aspect, in the embodiments of the present disclosure, the audio signal in the environment where the terminal lies is acquired, and then the volume of the information output by the terminal is adjusted according to the attributes of the audio signal. Hence, technical solutions provided by embodiments of the present disclosure can automatically adjust the volume of the information output by the terminal, lower volume adjustment operation costs and improve the volume adjusting efficiency.Type: GrantFiled: December 31, 2015Date of Patent: December 24, 2019Assignee: BAIDU ONLINE NETWORK TECHNOLOGY (BEIJING) CO., LTD.Inventors: Cunchen Gong, Haiwei Li, Pengfei Zhao
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Patent number: 9755674Abstract: A system and method provide a signal carrier; an overt persistent digital channel containing a host signal and carried on the signal carrier; a non-persistent channel encoded onto the host signal by timing variation of the host signal, the non-persistent channel including access data for accessing hidden information in the host signal.Type: GrantFiled: May 5, 2015Date of Patent: September 5, 2017Assignee: Raytheon CompanyInventors: Gary M. Graceffo, Andrew M. Kowalevicz
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Patent number: 9625603Abstract: In some embodiments, an apparatus and a system, as well as a method and an article, may operate to transform acquired data into transformed data using at least one transform selected from a plurality of transforms according to an optimization metric calculation that operates on single, fixed-length packets of the transformed data, and a preselected quality criterion threshold. Further activity may include transmitting an amplified version of an electrical signal in a geological formation, the electrical signal including the transformed data. The amplified version may be received, and further activity may include transforming the transformed data into an estimate of acquired data, the transforming using at least one transform selected from a plurality of transforms according to an optimization metric calculation that operates on single, fixed-length packets of the transformed data and/or the estimate, and a preselected quality criterion threshold. Additional apparatus, systems, and methods are disclosed.Type: GrantFiled: May 27, 2011Date of Patent: April 18, 2017Assignee: Halliburton Energy Services, Inc.Inventors: Victor James Stolpman, Ehud Barak
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Patent number: 9467428Abstract: An information security attachment device for voice communication and an information security method for voice communication using the same are provided. The information security attachment device includes a user interface unit, a compression unit, an encryption and decryption unit, and a conversion unit. The user interface unit receives an information security request from a user, and displays whether or not information security is being performed. The compression unit compresses a voice signal. The encryption and decryption unit encrypts the compressed voice data in response to an information security request or an information security control command, requests a terminal to send the encrypted voice data, decrypts the encrypted voice data in response to an information security request or an information security control command, and outputs the decrypted voice data. The conversion unit restores the voice data to an analog voice signal, and outputs the restored analog voice signal.Type: GrantFiled: May 21, 2014Date of Patent: October 11, 2016Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventor: Hyungyul Ryu
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Patent number: 9131292Abstract: Provided is a wireless microphone system comprising a microphone and a wireless receiver, wherein the wireless microphone system is provided with: a normal communication mode in which communication is performed by using a normal unique word (UWN) preset in both the microphone and the wireless receiver devices; a confidential setting mode in which a confidential unique word (UWX) is transmitted without being set in either of said devices; and a confidential communication mode in which communication is performed by both said devices by using the confidential unique word (UWX) set by the confidential setting mode.Type: GrantFiled: December 9, 2011Date of Patent: September 8, 2015Assignee: TOA CorporationInventors: Ken'ichi Ejima, Takashi Ogura, Koji Moriguchi
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Patent number: 8934609Abstract: A mechanism is described that enables encrypted end-point communications in a VoIP network to be accessed by a service provider. The mechanism includes a session information retrieval component which gathers session information such as encryption keys for each session that traverses a network element. The encryption keys may be used to decrypt data to make it available for lawful interception. A media stream monitoring component monitors media streams and verifies that the identified keys for each session are valid, to ensure continuity in compliance with LI regulations. Advantageously a security alert component may be used to controls further session operation for those sessions identified as potential security risks. With such an arrangement, the service provider can satisfy the legal requirement to provide interception, verify that the accuracy of the legal interception support and take appropriate steps to handle security risks.Type: GrantFiled: June 21, 2006Date of Patent: January 13, 2015Assignee: Genband US LLCInventor: Michael Lee
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Patent number: 8842834Abstract: A method is provided for transmitting voice data in a secure communication system. The method includes: transmitting voice data using a plurality of data packets; embedding a cryptographic message indicator into each of the plurality of data packets; and correcting for bit errors in the cryptographic message indicator at a packet receiver using code-combining across two or more of the data packets.Type: GrantFiled: March 19, 2007Date of Patent: September 23, 2014Assignee: Harris CorporationInventors: Mark Chamberlain, John Alvermann, Leonard Picone
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Patent number: 8744083Abstract: VoIP systems often use multiple ciphers for different components. The present invention includes a system and method for early detection of encrypted signals in packet networks that may be encrypted using any of a multitude of ciphers.Type: GrantFiled: June 29, 2012Date of Patent: June 3, 2014Assignee: Mitel Networks CorporationInventor: Lee Dilkie
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Patent number: 8744084Abstract: The subject matter described herein includes methods, systems, and computer readable medium for scrambled communication of data to, from, or over a medium. According to one aspect, the subject matter described herein includes a method for communicating data in scrambled form to or over a medium. The method includes receiving analog or digital data to be transmitted to or over a medium. The method further includes modulating samples representing at least signal using the analog or digital data to produce data modulated signal samples. The method further includes scrambling the data modulated signal samples using a predetermined scrambling algorithm. The method further includes transmitting the scrambled data modulated signal samples to or over the medium. The method further includes descrambling samples received from the medium using the inverse of the predetermined scrambling algorithm to obtain the unscrambled modulated signal samples, which can then be demodulated to retrieve original data.Type: GrantFiled: May 5, 2009Date of Patent: June 3, 2014Inventors: Kunal Kandekar, Mihail L. Sichitiu
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Patent number: 8705348Abstract: A system and method for facilitating anti-replay protection with multi-sender traffic is disclosed. The system employs time-based anti-replay protection wherein a sender transmits a data packet with a pseudo-timestamp encapsulated in a metadata payload. At the receiving end, the receiver compares the pseudo-timestamp information received with its own pseudo-time, determines if a packet is valid, and rejects a replay packet. The pseudo-time information is transmitted through the metadata payload and new fields need not be added to the IPSec (IP Security) Protocol, thus the existing hardware can be employed without any changes or modifications.Type: GrantFiled: April 18, 2007Date of Patent: April 22, 2014Assignee: Cisco Technology, Inc.Inventors: Scott Roy Fluhrer, Lingyan Huang, Brian E. Weis, Sheela Dixit Rowles
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Publication number: 20140093083Abstract: A method, device, and system for secure end-to-end audio recognition is disclosed. A client device launches an application that connects with a server. The client device and server exchange cryptographic keys and establish a secure connection and a shared cryptographic key. The server transmits an encrypted audio prompt to the client device. The client device decrypts the encrypted audio prompt and stores the decrypted audio prompt in secure memory inaccessible to the operating system using an audio engine of the client device. The audio engine then retrieves the audio and renders it for the user through the speakers of the client device. The client device captures the user's audio response with a microphone and stores the audio response in the secure memory. The stored audio response is encrypted and transmitted to the server.Type: ApplicationFiled: September 28, 2012Publication date: April 3, 2014Inventors: Saurabh Dadu, Karthik K. Rishi, Gyan Prakash, Rajesh Poornachandran
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Publication number: 20140056428Abstract: The disclosed embodiments relate to systems and methods for securely accessing a phrase table. One or more records in the phrase table are encrypted using a first set of keys. The first set of keys is encrypted using a second key. A decoder module is compiled based on the second key. Thereafter, the one or more encrypted records and/or the decoder module are transmitted to the first computing device at the client side. The first set of encrypted keys is transmitted to a second computing device. The first computing device transmits a request to the first computing device to send an encrypted key. The decoder module decrypts the encrypted key to generate a key. The first computing device uses the key to decrypt one or more encrypted records.Type: ApplicationFiled: August 21, 2012Publication date: February 27, 2014Applicant: XEROX CORPORATIONInventor: Nicola Cancedda
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Patent number: 8619996Abstract: Provided are a method and apparatus for transmitting digital multimedia broadcasting data, and a method and apparatus for receiving digital multimedia broadcasting data. A basic audio signal and a multichannel audio signal are encoded to generate a basic audio stream and a multichannel audio stream, and a first data stream describing property and position data of the basic audio stream and a second data stream describing property and position data of the multichannel audio stream are transmitted as independent streams. According to the performance of the receiving apparatus, an audio signal may be decoded by using just the first data stream only or both the first data stream and the second stream.Type: GrantFiled: August 18, 2010Date of Patent: December 31, 2013Assignee: Samsung Electronics Co., Ltd.Inventors: Han-gil Moon, Kyung-sun Cho, Hyun-wook Kim
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Patent number: 8619989Abstract: A home wireless router establishes a Wireless Local Area Network (WLAN) that supports wireless communications within a WLAN service area. The home wireless router establishes broadband communications via a broadband connection with a VoIP service accumulator. The home wireless router services a plurality of wireless terminals within the WLAN service area, including at least one Voice over Internet Protocol (VoIP) wireless terminal. The home wireless router determines that a VoIP wireless terminal desires VoIP call servicing determines a WLAN encryption scheme supported by the VoIP wireless terminal, sets up, and services the VoIP call via the WLAN and the broadband connection. Servicing includes terminating the WLAN encryption scheme supported by the VoIP wireless terminal to protect the VoIP call as it is wirelessly serviced by the WLAN and terminating a broadband encryption scheme supported by the broadband connection to protect the VoIP call as it is serviced by the broadband connection.Type: GrantFiled: May 14, 2004Date of Patent: December 31, 2013Assignee: Broadcom CorporationInventor: Jeffrey L. Thermond
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Patent number: 8552900Abstract: A successive approximation register switched capacitor analog to digital converter utilizes a high frequency clock for controlling comparator reset switches and a clock distribution block to operate at lower sample rates. The successive approximation cycles are clocked with the high frequency clock so that the reset switches stay within the leakage limit irrespective of the sample rate but the end of conversion signal is delayed to mimic the slower sample rate.Type: GrantFiled: April 20, 2012Date of Patent: October 8, 2013Assignee: Texas Instruments IncorporatedInventors: Haydar Bilhan, Maher Mahmoud Sarraj
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Patent number: 8520852Abstract: A method includes: receiving a plurality of audio frames, assembling groups of the audio frames into logical recording units, storing a plurality of the logical recording units, retrieving the stored logical recording units, and decoding the retrieved logical recording units. An apparatus that performs the method is also provided.Type: GrantFiled: July 31, 2008Date of Patent: August 27, 2013Assignee: iBiquity Digital CorporationInventors: Chinmay Shah, Ashwini Pahuja, Nandu Parimi
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Patent number: 8498869Abstract: A method including: obtaining, via a plurality of communication devices, a plurality of speech signals respectively associated with human speakers, the speech signals including verbal components and non-verbal components; identifying a plurality of geographical locations, each geographic location associated with a respective one of the plurality of the communication devices; extracting the non-verbal components from the obtained speech signals; deducing physiological or psychological conditions of the human speakers by analyzing, over a specified period, the extracted non-verbal components, using predefined relations between characteristics of the non-verbal components and physiological or psychological conditions of the human speakers; and providing a geographical distribution of the deduced physiological or psychological conditions of the human speakers by associating the deduced physiological or psychological conditions of the human speakers with geographical locations thereof.Type: GrantFiled: April 30, 2012Date of Patent: July 30, 2013Assignee: Nuance Communications, Inc.Inventors: Slava Shechtman, Raphael Steinberg
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Patent number: 8462942Abstract: An approach is provided for providing secure packetized voice transmissions. A public/private key pair is generated at a call device (or endpoint). An encrypted voice stream is received from another call device, where the encrypted voice stream was encrypted using a public key of the public/private key pair. This encrypted voice stream when received at the call device is decrypted using a private key of the public/private key pair.Type: GrantFiled: August 17, 2009Date of Patent: June 11, 2013Assignee: Verizon Patent and Licensing Inc.Inventors: David E. Berggren, Steven E. Belczyk
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Patent number: 8422679Abstract: A transmitting device encrypts DMR voice superframes using encryption parameters and sends the encryption parameters in at least one of the voice superframes by: identifying a selected number of bits from a plurality of vocoder frames the voice superframe; replacing each of the identified bits with a corresponding bit of a first encryption parameter; placing at least one encryption parameter in an embedded signaling field of the voice superframe; and transmitting the voice superframe with the encryption parameters to a receiving device. The receiving device extracts the encryption parameters, which can be a key identifier, an algorithm identifier, and an initialization vector for use in decrypting messages from the transmitting device.Type: GrantFiled: October 17, 2008Date of Patent: April 16, 2013Assignee: Motorola Solutions, Inc.Inventors: Dipendra M. Chowdhary, John P. Belmonte, David G. Wiatrowski
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Patent number: 8355514Abstract: Methods of processing audio to convey auxiliary information hidden therein are provided. Various arrangements are disclosed. One alters data representing audio to include a sequence of bits of auxiliary information. The altering is based on a carrier signal and corresponding to the sequence of bits, and is based on a perceptibility threshold that varies within the data representing audio. Other arrangements are provided as well.Type: GrantFiled: October 26, 2007Date of Patent: January 15, 2013Assignee: Digimarc CorporationInventor: Geoffrey B. Rhoads
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Publication number: 20120263302Abstract: A voice transmission apparatus is provided. The voice transmission apparatus includes a voice input unit, an Analog-to-Digital (AD) converter, a transmission synchronization unit, a channel status determination unit, and a transmission unit. The voice input unit receives an analog voice signal corresponding to a communication session. The AD converter converts the analog voice signal into a digital signal. The transmission synchronization unit generates a transmission target signal by respectively assigning a start identifier and an end identifier to the first frame and final frame of the digital signal corresponding to the communication session. The channel status determination unit determines the status of a channel. The transmission unit transmits the transmission target signal over the channel in such a way that the transmission rate of the transmission target signal is set on a communication session basis depending on the status of the channel.Type: ApplicationFiled: April 6, 2012Publication date: October 18, 2012Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Young-Ho SON, Jang-Hong YOON
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Patent number: 8244305Abstract: Secure, digital, packet-switched, voice telephony calls are wirelessly transmitted in an efficient manner that reduces air interface bandwidth consumption by encrypting only vocoder data frames containing encoded speech, and not encrypting vocoder data frames that do not contain speech, such as those containing silence parameters. The collective reduced bandwidth consumption across a large number of voice telephony calls may allow for the admission of one or more new calls during times of voice telephony congestion. Not encrypting the silence parameters does not compromise call privacy or security, since the silence data frames do not carry any speech. The classification of encoded data frames as containing speech or not may be performed in a variety of ways.Type: GrantFiled: June 4, 2007Date of Patent: August 14, 2012Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Rajaram Ramesh, Kumar Balachandran, Havish Koorapaty
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Patent number: 8209750Abstract: Separate IP data streams, including both voice (VoIP) and data sources, are routed over a single network data stream, encrypted by a single KIV encryption unit, and transmitted as a single packet data stream including both computer and voice data. Integration of the use of a VoIP data stream, together with data sources, and encrypted through a single serial encryption unit such as a KIV-7 enables the encryption of both voice and data using a single KIV encryption unit. After encryption by the Type 1 encryption unit (e.g., KIV-7) in a remotely deployed, secure communication system, the single encrypted data stream is encapsulated into IP packets. The IP packets are addressed to a distant IP device that removes the encapsulated, encrypted data and passes it to a similar Type 1 KIV device for decryption, and distributed to voice devices and computer devices via another voice-enabled router.Type: GrantFiled: April 20, 2010Date of Patent: June 26, 2012Assignee: TeleCommunication Systems, Inc.Inventors: Steve Anspach, Luke Salazar, Brian Heyliger, Greg Kasson, Jeff West
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Patent number: 8200480Abstract: A method including: obtaining, via a plurality of communication devices, a plurality of speech signals respectively associated with human speakers, the speech signals including verbal components and non-verbal components; identifying a plurality of geographical locations, each geographic location associated with a respective one of the plurality of the communication devices; extracting the non-verbal components from the obtained speech signals; deducing physiological or psychological conditions of the human speakers by analyzing, over a specified period, the extracted non-verbal components, using predefined relations between characteristics of the non-verbal components and physiological or psychological conditions of the human speakers; and providing a geographical distribution of the deduced physiological or psychological conditions of the human speakers by associating the deduced physiological or psychological conditions of the human speakers with geographical locations thereof.Type: GrantFiled: September 30, 2009Date of Patent: June 12, 2012Assignee: International Business Machines CorporationInventors: Slava Shechtman, Raphael Steinberg
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Patent number: 8117446Abstract: A method of providing secured teleconference in a distributed teleconference system including providing one or more servers interconnected in a distributed structure, providing at least two participants which include at least one speaker; where each participant is a listener. Each participant is connected to a server and is associated with a secured teleconferencing application, encrypting the data that is created by the speaker's application, building an authentication tag by the speaker application, transmitting a media packet by the speaker's application to the connected server, checking authentication tag validity by each server that receives a media packet and selectively distributing the media packet if the authentication tag check succeeded and checking authentication tag validity by each listener that receives a media packet and decryption of the encrypted data provided that the authentication tag validity check succeeded.Type: GrantFiled: July 9, 2007Date of Patent: February 14, 2012Assignee: Interwise Ltd.Inventor: Masha Dorfman
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Patent number: 8098693Abstract: The present invention provides a method of early starting the operation of a descrambler. The method comprises the steps of receiving a, synchronous byte of a transport packet in a group of m packets, where m is an integer, generating an alignment index to indicate a location of the synchronous byte, delivering the alignment index to the descrambler, and loading an initialization sequence to the descrambler in accordance with the alignment index and starting an operation of the descrambler.Type: GrantFiled: May 3, 2006Date of Patent: January 17, 2012Assignee: Himax Technologies LimitedInventors: Tien-Hsin Chang, Shin-Shiuan Cheng
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Patent number: 8036249Abstract: A data verification method and system is provided. The data verification method includes the steps of transmitting data from a sender to a receiver over a signaling channel, transmitting a first set of bits to the receiver over a voice channel, wherein the first set of bits is generated using the data in the sender, and verifying the data through comparison between the first set of bits and a second set of bits that is generated based on the data in the receiver. The first and the second sets of bits may be a group of bits that are selected from a hash value using a selection mask in the sender and the receiver respectively, wherein the section mask has the same length as the hash value and the hash value is calculated based on the data, and the selection mask may be pre-defined between the sender and the receiver.Type: GrantFiled: December 31, 2007Date of Patent: October 11, 2011Assignee: Samsung Electronics Co., Ltd.Inventors: Tymur Korkishko, Kyung-Hee Lee
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Patent number: 7961881Abstract: Apparatus and methods for including a code having at least one code frequency component in an audio signal are provided. The abilities of various frequency components in the audio signal to mask the code frequency component to human hearing are evaluated and based on these evaluations an amplitude is assigned to the code frequency component. Methods and apparatus for detecting a code in an encoded audio signal are also provided. A code frequency component in the encoded audio signal is detected based on an expected code amplitude or on a noise amplitude within a range of audio frequencies including the frequency of the code component.Type: GrantFiled: November 4, 2005Date of Patent: June 14, 2011Assignee: Arbitron Inc.Inventors: James M. Jensen, Wendell D. Lynch, Michael M. Perelshteyn, Robert B. Graybill, Sayed Hassan, Wayne Sabin
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Error correcting decoding for convolutional and recursive systematic convolutional encoded sequences
Patent number: 7877670Abstract: The invention relates to error-correcting coding and correct restart of decoding after errors of sequences that are coded by convolutional coders or LFSR based descramblers. The signals can be binary or multi-valued signals. Methods and apparatus to convolutional encode and decode sequences of binary and n-valued symbols are disclosed. The invention further discloses methods and apparatus to identify symbols in error in sequences coded according to methods of the invention. Methods and apparatus to correct these errors are provided. Methods and apparatus to repair errors in a Trellis of received sequences are also provided. Methods and apparatus for n-valued Recursive Systematic Convolutional coders and decoders are disclosed.Type: GrantFiled: December 5, 2006Date of Patent: January 25, 2011Assignee: Ternarylogic LLCInventor: Peter Lablans -
Publication number: 20100202615Abstract: Separate IP data streams, including both voice (VoIP) and data sources, are routed over a single network data stream, encrypted by a single KIV encryption unit, and transmitted as a single packet data stream including both computer and voice data. Integration of the use of a VoIP data stream, together with data sources, and encrypted through a single serial encryption unit such as a KIV-7 enables the encryption of both voice and data using a single KIV encryption unit. After encryption by the Type 1 encryption unit (e.g., KIV-7) in a remotely deployed, secure communication system, the single encrypted data stream is encapsulated into IP packets. The IP packets are addressed to a distant IP device that removes the encapsulated, encrypted data and passes it to a similar Type 1 KIV device for decryption, and distributed to voice devices and computer devices via another voice-enabled router.Type: ApplicationFiled: April 20, 2010Publication date: August 12, 2010Inventor: Steve Anspach
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Publication number: 20100176966Abstract: A method for communicating utility data includes receiving a voice signal and a data signal via a utility network, combining the voice signal and the data signal to form a communication signal, and transmitting the communication signal to a plurality of utility asset controllers and handheld devices via the utility network.Type: ApplicationFiled: January 9, 2009Publication date: July 15, 2010Inventors: Nathan Bowman Littrell, Kenneth James Caird, Lincoln Mamoru Fujita
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Publication number: 20100166178Abstract: An approach is provided for providing secure packetized voice transmissions. A public/private key pair is generated at a call device (or endpoint). An encrypted voice stream is received from another call device, where the encrypted voice stream was encrypted using a public key of the public/private key pair. This encrypted voice stream when received at the call device is decrypted using a private key of the public/private key pair.Type: ApplicationFiled: August 17, 2009Publication date: July 1, 2010Applicant: VERIZON PATENT AND LICENSING INC.Inventors: David E. Berggren, Steven E. Belczyk
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Patent number: 7725779Abstract: Method and apparatus for writing scrambled multi-value data to a physical media and for reading scrambled multi-value data from a physical media, are disclosed. The physical media can be an optical disk. The scrambling can be performed by a multi-valued LFSR scrambler and the descrambling can be performed by a multi-valued LFSR descrambler. Further, the multi-valued data that is scrambled can include synchronization data and/or user data. Error correction coding can be used during the writing process and processing to correct for errors can be used during the reading process. Also, methods and apparatus for synchronizing multi-valued data written to and read from physical media are disclosed. Multi-value correlation methods and apparatus are also disclosed.Type: GrantFiled: January 25, 2005Date of Patent: May 25, 2010Assignee: Ternarylogic LLCInventor: Peter Lablans
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Publication number: 20100002882Abstract: The invention relates to a method for anonymising the communication of mobile terminals which permit speech communication, using an anonymising network which comprises a series of routers and which has at least one access node, wherein each mobile terminal establishes a connection with at least one access node, comprising the following steps: signing the mobile terminal onto the network via an access node; preparation of an identity in the network; communication via the anonymised network, wherein the network selects different random routes through the network for communication, so that back-tracing is prevented and wherein communication is encrypted.Type: ApplicationFiled: July 17, 2008Publication date: January 7, 2010Inventors: Frank Rieger, Robbert Gonggrijp
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Publication number: 20090327703Abstract: A security platform or network for transmitting end-to-end encrypted voice or data communications between at least a first digital device and a second device is disclosed. The network includes a network portal for registering the first digital device and the second device. The portal provides the first digital device and second device with at least first and second keys and receives requests from each device to communicate with each other. The portal searches for and receives authorization from the called device to set up a secure session with the calling device. The portal receives encrypted messages from the devices, decrypts the encrypted messages with the keys provided to the devices, and re-encrypts the received messages. The portal sends the re-encrypted messages to the other device. Accordingly, the devices are capable of securely communicating with each other by encrypting and decrypting the messages sent to and received from the portal.Type: ApplicationFiled: May 23, 2008Publication date: December 31, 2009Applicant: SECUREANT, INC.Inventors: Christopher V. FEUDO, Thomas J. ZACHARKEVICS
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Publication number: 20090182668Abstract: Methods and systems are described for communicating the session keys used to encrypt media stream to allow a lawful intercept agency to decrypt the media stream. Assuming the endpoints negotiate the session keys themselves, the send an encrypted format key message which is encrypted with an encryption key for which only the LI agency knows the corresponding decryption key. However, to avoid abuse by the LI agency, or even to avoid the perception that LI agencies can intercept private calls without due process, the media session key is further encrypted with at least one additional key, with the corresponding decryption key(s) being unknown to the LI agency.Type: ApplicationFiled: December 31, 2008Publication date: July 16, 2009Applicant: NORTEL NETWORKS LIMITEDInventor: Michael LEE
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Patent number: 7558389Abstract: A method and apparatus utilizing prosody modification of a speech signal output by a text-to-speech (TTS) system to substantially prevent an interactive voice response (IVR) system from understanding the speech signal without significantly degrading the speech signal with respect to human understanding. The present invention involves modifying the prosody of the speech output signal by using the prosody of the user's response to a prompt. In addition, a randomly generated overlay frequency is used to modify the speech signal to further prevent an IVR system from recognizing the TTS output. The randomly generated frequency may be periodically changed using an overlay timer that changes the random frequency signal at a predetermined intervals.Type: GrantFiled: October 1, 2004Date of Patent: July 7, 2009Assignee: AT&T Intellectual Property II, L.P.Inventor: Joseph DeSimone
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Patent number: 7536014Abstract: A scrambling code generating apparatus of a downlink transmitter in a UMTS mobile communication system, which uses one primary scrambling code for separation of base stations and multiple secondary scrambling codes for channel separation. The apparatus includes a first m-sequence generator for generating a first m-sequence and a second m-sequence generator for generating a second m-sequence. A first summer adds the first and second m-sequences to generate the primary scrambling code. A plurality of first masking sections each shift the first m-sequence, and a plurality of second masking sections corresponding to the respective first masking sections each shifts the second m-sequence. A plurality of second summers each adds one of the first shifted m-sequences with the second m-sequence corresponding to the first m-sequence. The output of the second summers thus generates the multiple secondary scrambling codes.Type: GrantFiled: December 3, 2004Date of Patent: May 19, 2009Assignee: Samsung Electronics Co., Ltd.Inventors: Jae-Yoel Kim, Hee-Won Kang
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Patent number: 7522730Abstract: A microphone unit comprising a voice input for receiving a voice input signal, an analog to digital converter for creating a digital signal from voice signal, a voice coding device for creating a voice coded signal output from the digital signal, encryption means for encrypting the voice coded signal, and a modulator for generating a transmittable signal that can be supplied to a radio via the microphone input. Additionally, the microphone unit is capable of performing the steps in reverse upon receiving an encrypted signal. The received signal output from the radio is demodulated, un-encrypted, voice decoded, converted from a digital voice signal to an analog voice signal, and output via a speaker which is preferably built into the microphone unit.Type: GrantFiled: April 14, 2004Date of Patent: April 21, 2009Assignee: M/A-Com, Inc.Inventors: John Vaughan, Dennis Michael Martinez
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Patent number: 7505898Abstract: A simple and efficient method for producing an obfuscated speech signal which may be used to mask a stream of speech, is disclosed. A speech signal representing the speech stream to be masked is obtained. The speech signal is then temporally partitioned into segments, preferably corresponding to phonemes within the speech stream. The segments are then stored in a memory, and some or all of the segments are subsequently selected, retrieved, and assembled into an obfuscated speech signal representing an unintelligible speech stream that, when combined with the speech signal or reproduced and combined with the speech stream, provides a masking effect. While the presently preferred embodiment finds application most readily in an open plan office, embodiments suitable for use in restaurants, classrooms, and in telecommunications systems are also disclosed.Type: GrantFiled: July 11, 2006Date of Patent: March 17, 2009Assignee: Applied Minds, Inc.Inventors: W. Daniel Hillis, Bran Ferren, Russel Howe
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Publication number: 20090060193Abstract: A communication device for encrypted transmission of information via unencrypted transmission paths has at least one loudspeaker, one microphone, one audio processing facility, one encryption facility, and one transmission facility. Information is encrypted by the encryption facility and transmitted via unencrypted transmission paths by the transmission facility by further communication instruments. Thus, flexible use on the basis of the various communication instruments which can be used for encrypted transmission is made possible.Type: ApplicationFiled: December 12, 2007Publication date: March 5, 2009Applicant: Rohde & Schwarz SIT GmbHInventors: Georg Jahnen, Jens Rehwagen, Anton Enterrottacher
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Publication number: 20090016531Abstract: A method of providing secured teleconference in a distributed teleconference system including providing one or more servers interconnected in a distributed structure, providing at least two participants which include at least one speaker; where each participant is a listener. Each participant is connected to a server and is associated with a secured teleconferencing application, encrypting the data that is created by the speaker's application, building an authentication tag by the speaker application, transmitting a media packet by the speaker's application to the connected server, checking authentication tag validity by each server that receives a media packet and selectively distributing the media packet if the authentication tag check succeeded and checking authentication tag validity by each listener that receives a media packet and decryption of the encrypted data provided that the authentication tag validity check succeeded.Type: ApplicationFiled: July 9, 2007Publication date: January 15, 2009Inventor: Masha Dorfman
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Patent number: 7460671Abstract: In one aspect, a device includes an encoder configured to receive a speech sample and generate an encoded voice packet from the speech sample, the encoded voice packet having a packet size and a plurality of bytes. The device also includes an encryption unit configured to receive a voice block and generate an encrypted voice block, the voice block having a block size, wherein the packet size is not divisible by the block size and yields a remainder. The device further includes a packet block manager configured to divide the encoded voice packet into a plurality of the voice blocks and provide the plurality of the voice blocks to the encryption unit, the packet block manager further configured to create a remainder voice block including remainder bytes of the encoded voice packet and additional bytes from the encrypted voice block and provide the remainder voice block to the encryption unit.Type: GrantFiled: June 19, 2003Date of Patent: December 2, 2008Assignee: Mindspeed Technologies, Inc.Inventors: Norbert Rossello, Fabien Klein
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Publication number: 20080292102Abstract: A method and system for transmitting optical clock signals and quantum key signals on a single optical channel, and for reducing quantum bit error rate in a quantum key distribution system. The method includes receiving a multi-photon optical clock signal at an electro-optic switch at a first clock rate. The electro-optic switch may be configured for an interval defined by a second clock rate for generating a single photon quantum key signal. The multi-photon optical clock signal and the single photon quantum key signal may be combined such that the single optical channel transmits the single photon quantum key signal at a first interval and the multi-photon optical clock signal at a second interval. The quantum key signal may be transmitted from a transmitter at a first timing, and detected by a detector at a receiver. An output signal of the detector may be sampled at a second timing that is delayed relative to the first timing for reducing quantum bit error rate.Type: ApplicationFiled: May 25, 2007Publication date: November 27, 2008Inventors: Shuoqin Wang, Daniel M. Zehnder, Jeffrey H. Hunt
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Publication number: 20080232589Abstract: A method is provided for transmitting voice data in a secure communication system. The method includes: transmitting voice data using a plurality of data packets; embedding a cryptographic message indicator into each of the plurality of data packets; and correcting for bit errors in the cryptographic message indicator at a packet receiver using code-combining across two or more of the data packets.Type: ApplicationFiled: March 19, 2007Publication date: September 25, 2008Applicant: Harris CorporationInventors: Mark Chamberlain, John Alvermann, Leonard Picone
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Publication number: 20080144827Abstract: A method, system and computer-readable medium for providing a user identity-based secure channel between a digital telephone and a service provider is presented. At the service provider, an encrypted voice transmission from a digital telephone is decrypted. The voice transmission was encrypted at the digital telephone by using a user voice encryption key that was created in the digital telephone. The user voice encryption key was created at the digital telephone by inputting a telephone identifier and a called telephone number into a public encryption key algorithm that is supplied by the service provider. By decrypting the encrypted voice transmission, the service provider is able to extract the voice transmission, the telephone identifier, and the called telephone number, thus allowing the service provider to route the voice transmission to an appropriate answering party at the service provider.Type: ApplicationFiled: December 18, 2006Publication date: June 19, 2008Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Brent L. Davis, Peeyush Jaiswal, Naveen Narayan
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Patent number: 7362867Abstract: A scrambling code generating apparatus of a downlink transmitter in a UMTS mobile communication system, which uses one primary scrambling code for separation of base stations and multiple secondary scrambling codes for channel separation. The apparatus includes a first m-sequence generator for generating a first m-sequence and a second m-sequence generator for generating a second m-sequence. A first summer adds the first and second m-sequences to generate the primary scrambling code. A plurality of first masking sections each shift the first m-sequence, and a plurality of second masking sections corresponding to the respective first masking sections each shifts the second m-sequence. A plurality of second summers each adds one of the first shifted m-sequences with the second m-sequence corresponding to the first m-sequence. The output of the second summers thus generates the multiple secondary scrambling codes.Type: GrantFiled: July 7, 2000Date of Patent: April 22, 2008Assignee: Samsung Electronics Co., LtdInventors: Jae-Yoel Kim, Hee-Won Kang
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Publication number: 20080037788Abstract: A data decryption apparatus that decrypts encrypted data, includes a first data-receiving unit that receives a first data set, in which information on an encryption specification is embedded, through a first communication path; a time-information obtaining unit that obtains time information on a reception of the first data set by the first data receiving unit; a time-information storage unit that stores the time information with the information on the encryption specification associated therewith; a second data-receiving unit that receives a second data set through a second communication path, the second data set being encrypted based on the encryption-specification and appended by time information on performing data encryption; and an encryption-specification selecting unit that selects an encryption specification for use in decryption of the second data set based on the time information stored in the time-information storage unit and the time information appended to the second data set.Type: ApplicationFiled: July 23, 2007Publication date: February 14, 2008Applicant: FUJITSU LIMITEDInventors: Taro Togawa, Kaori Endo, Takeshi Otani, Masakiyo Tanaka, Yasuji Ota
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Patent number: 7308104Abstract: Disclosed are a forward multiple scrambling code generating method and apparatus in a communication system. Each base station uses primary scrambling codes and an associated one of secondary scrambling code sets, each consisting of a plurality of secondary scrambling codes. When an n-th one of the primary scrambling codes is to be generated, an initial value of the scrambling code generator is set with a binary value of “n,” so that a desired primary scrambling code is generated using the initial value. When an n-th one of the secondary scrambling codes in an m-th one of the secondary scrambling code sets is to be generated, an initial value of the scrambling code generator is set with a value obtained by shifting the n-th primary scrambling code by m times, thereby generating a desired secondary scrambling code.Type: GrantFiled: August 15, 2000Date of Patent: December 11, 2007Assignee: LG Information & Communications, Ltd.Inventors: Ki Jun Kim, Young Jo Lee, Young Cho Kim
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Patent number: 7184952Abstract: A simple and efficient method for producing an obfuscated speech signal which may be used to mask a stream of speech, is disclosed. A speech signal representing the speech stream to be masked is obtained. The speech signal is then temporally partitioned into segments, preferably corresponding to phonemes within the speech stream. The segments are then stored in a memory, and some or all of the segments are subsequently selected, retrieved, and assembled into an obfuscated speech signal representing an unintelligible speech stream that, when combined with the speech signal or reproduced and combined with the speech stream, provides a masking effect. While the presently preferred embodiment finds application most readily in an open plan office, embodiments suitable for use in restaurants, classrooms, and in telecommunications systems are also disclosed.Type: GrantFiled: July 12, 2006Date of Patent: February 27, 2007Assignee: Applied Minds, Inc.Inventors: W. Daniel Hillis, Bran Ferren, Russel Howe