Speech Scrambler Detail Patents (Class 380/275)
  • Patent number: 10516776
    Abstract: 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: Grant
    Filed: December 31, 2015
    Date of Patent: December 24, 2019
    Assignee: BAIDU ONLINE NETWORK TECHNOLOGY (BEIJING) CO., LTD.
    Inventors: Cunchen Gong, Haiwei Li, Pengfei Zhao
  • Patent number: 9755674
    Abstract: 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: Grant
    Filed: May 5, 2015
    Date of Patent: September 5, 2017
    Assignee: Raytheon Company
    Inventors: Gary M. Graceffo, Andrew M. Kowalevicz
  • Patent number: 9625603
    Abstract: 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: Grant
    Filed: May 27, 2011
    Date of Patent: April 18, 2017
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Victor James Stolpman, Ehud Barak
  • Patent number: 9467428
    Abstract: 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: Grant
    Filed: May 21, 2014
    Date of Patent: October 11, 2016
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventor: Hyungyul Ryu
  • Patent number: 9131292
    Abstract: 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: Grant
    Filed: December 9, 2011
    Date of Patent: September 8, 2015
    Assignee: TOA Corporation
    Inventors: Ken'ichi Ejima, Takashi Ogura, Koji Moriguchi
  • Patent number: 8934609
    Abstract: 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: Grant
    Filed: June 21, 2006
    Date of Patent: January 13, 2015
    Assignee: Genband US LLC
    Inventor: Michael Lee
  • Patent number: 8842834
    Abstract: 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: Grant
    Filed: March 19, 2007
    Date of Patent: September 23, 2014
    Assignee: Harris Corporation
    Inventors: Mark Chamberlain, John Alvermann, Leonard Picone
  • Patent number: 8744083
    Abstract: 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: Grant
    Filed: June 29, 2012
    Date of Patent: June 3, 2014
    Assignee: Mitel Networks Corporation
    Inventor: Lee Dilkie
  • Patent number: 8744084
    Abstract: 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: Grant
    Filed: May 5, 2009
    Date of Patent: June 3, 2014
    Inventors: Kunal Kandekar, Mihail L. Sichitiu
  • Patent number: 8705348
    Abstract: 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: Grant
    Filed: April 18, 2007
    Date of Patent: April 22, 2014
    Assignee: Cisco Technology, Inc.
    Inventors: Scott Roy Fluhrer, Lingyan Huang, Brian E. Weis, Sheela Dixit Rowles
  • Publication number: 20140093083
    Abstract: 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: Application
    Filed: September 28, 2012
    Publication date: April 3, 2014
    Inventors: Saurabh Dadu, Karthik K. Rishi, Gyan Prakash, Rajesh Poornachandran
  • Publication number: 20140056428
    Abstract: 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: Application
    Filed: August 21, 2012
    Publication date: February 27, 2014
    Applicant: XEROX CORPORATION
    Inventor: Nicola Cancedda
  • Patent number: 8619996
    Abstract: 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: Grant
    Filed: August 18, 2010
    Date of Patent: December 31, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Han-gil Moon, Kyung-sun Cho, Hyun-wook Kim
  • Patent number: 8619989
    Abstract: 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: Grant
    Filed: May 14, 2004
    Date of Patent: December 31, 2013
    Assignee: Broadcom Corporation
    Inventor: Jeffrey L. Thermond
  • Patent number: 8552900
    Abstract: 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: Grant
    Filed: April 20, 2012
    Date of Patent: October 8, 2013
    Assignee: Texas Instruments Incorporated
    Inventors: Haydar Bilhan, Maher Mahmoud Sarraj
  • Patent number: 8520852
    Abstract: 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: Grant
    Filed: July 31, 2008
    Date of Patent: August 27, 2013
    Assignee: iBiquity Digital Corporation
    Inventors: Chinmay Shah, Ashwini Pahuja, Nandu Parimi
  • Patent number: 8498869
    Abstract: 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: Grant
    Filed: April 30, 2012
    Date of Patent: July 30, 2013
    Assignee: Nuance Communications, Inc.
    Inventors: Slava Shechtman, Raphael Steinberg
  • Patent number: 8462942
    Abstract: 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: Grant
    Filed: August 17, 2009
    Date of Patent: June 11, 2013
    Assignee: Verizon Patent and Licensing Inc.
    Inventors: David E. Berggren, Steven E. Belczyk
  • Patent number: 8422679
    Abstract: 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: Grant
    Filed: October 17, 2008
    Date of Patent: April 16, 2013
    Assignee: Motorola Solutions, Inc.
    Inventors: Dipendra M. Chowdhary, John P. Belmonte, David G. Wiatrowski
  • Patent number: 8355514
    Abstract: 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: Grant
    Filed: October 26, 2007
    Date of Patent: January 15, 2013
    Assignee: Digimarc Corporation
    Inventor: Geoffrey B. Rhoads
  • Publication number: 20120263302
    Abstract: 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: Application
    Filed: April 6, 2012
    Publication date: October 18, 2012
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Young-Ho SON, Jang-Hong YOON
  • Patent number: 8244305
    Abstract: 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: Grant
    Filed: June 4, 2007
    Date of Patent: August 14, 2012
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Rajaram Ramesh, Kumar Balachandran, Havish Koorapaty
  • Patent number: 8209750
    Abstract: 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: Grant
    Filed: April 20, 2010
    Date of Patent: June 26, 2012
    Assignee: TeleCommunication Systems, Inc.
    Inventors: Steve Anspach, Luke Salazar, Brian Heyliger, Greg Kasson, Jeff West
  • Patent number: 8200480
    Abstract: 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: Grant
    Filed: September 30, 2009
    Date of Patent: June 12, 2012
    Assignee: International Business Machines Corporation
    Inventors: Slava Shechtman, Raphael Steinberg
  • Patent number: 8117446
    Abstract: 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: Grant
    Filed: July 9, 2007
    Date of Patent: February 14, 2012
    Assignee: Interwise Ltd.
    Inventor: Masha Dorfman
  • Patent number: 8098693
    Abstract: 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: Grant
    Filed: May 3, 2006
    Date of Patent: January 17, 2012
    Assignee: Himax Technologies Limited
    Inventors: Tien-Hsin Chang, Shin-Shiuan Cheng
  • Patent number: 8036249
    Abstract: 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: Grant
    Filed: December 31, 2007
    Date of Patent: October 11, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Tymur Korkishko, Kyung-Hee Lee
  • Patent number: 7961881
    Abstract: 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: Grant
    Filed: November 4, 2005
    Date of Patent: June 14, 2011
    Assignee: Arbitron Inc.
    Inventors: James M. Jensen, Wendell D. Lynch, Michael M. Perelshteyn, Robert B. Graybill, Sayed Hassan, Wayne Sabin
  • Patent number: 7877670
    Abstract: 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: Grant
    Filed: December 5, 2006
    Date of Patent: January 25, 2011
    Assignee: Ternarylogic LLC
    Inventor: Peter Lablans
  • Publication number: 20100202615
    Abstract: 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: Application
    Filed: April 20, 2010
    Publication date: August 12, 2010
    Inventor: Steve Anspach
  • Publication number: 20100176966
    Abstract: 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: Application
    Filed: January 9, 2009
    Publication date: July 15, 2010
    Inventors: Nathan Bowman Littrell, Kenneth James Caird, Lincoln Mamoru Fujita
  • Publication number: 20100166178
    Abstract: 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: Application
    Filed: August 17, 2009
    Publication date: July 1, 2010
    Applicant: VERIZON PATENT AND LICENSING INC.
    Inventors: David E. Berggren, Steven E. Belczyk
  • Patent number: 7725779
    Abstract: 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: Grant
    Filed: January 25, 2005
    Date of Patent: May 25, 2010
    Assignee: Ternarylogic LLC
    Inventor: Peter Lablans
  • Publication number: 20100002882
    Abstract: 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: Application
    Filed: July 17, 2008
    Publication date: January 7, 2010
    Inventors: Frank Rieger, Robbert Gonggrijp
  • Publication number: 20090327703
    Abstract: 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: Application
    Filed: May 23, 2008
    Publication date: December 31, 2009
    Applicant: SECUREANT, INC.
    Inventors: Christopher V. FEUDO, Thomas J. ZACHARKEVICS
  • Publication number: 20090182668
    Abstract: 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: Application
    Filed: December 31, 2008
    Publication date: July 16, 2009
    Applicant: NORTEL NETWORKS LIMITED
    Inventor: Michael LEE
  • Patent number: 7558389
    Abstract: 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: Grant
    Filed: October 1, 2004
    Date of Patent: July 7, 2009
    Assignee: AT&T Intellectual Property II, L.P.
    Inventor: Joseph DeSimone
  • Patent number: 7536014
    Abstract: 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: Grant
    Filed: December 3, 2004
    Date of Patent: May 19, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jae-Yoel Kim, Hee-Won Kang
  • Patent number: 7522730
    Abstract: 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: Grant
    Filed: April 14, 2004
    Date of Patent: April 21, 2009
    Assignee: M/A-Com, Inc.
    Inventors: John Vaughan, Dennis Michael Martinez
  • Patent number: 7505898
    Abstract: 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: Grant
    Filed: July 11, 2006
    Date of Patent: March 17, 2009
    Assignee: Applied Minds, Inc.
    Inventors: W. Daniel Hillis, Bran Ferren, Russel Howe
  • Publication number: 20090060193
    Abstract: 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: Application
    Filed: December 12, 2007
    Publication date: March 5, 2009
    Applicant: Rohde & Schwarz SIT GmbH
    Inventors: Georg Jahnen, Jens Rehwagen, Anton Enterrottacher
  • Publication number: 20090016531
    Abstract: 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: Application
    Filed: July 9, 2007
    Publication date: January 15, 2009
    Inventor: Masha Dorfman
  • Patent number: 7460671
    Abstract: 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: Grant
    Filed: June 19, 2003
    Date of Patent: December 2, 2008
    Assignee: Mindspeed Technologies, Inc.
    Inventors: Norbert Rossello, Fabien Klein
  • Publication number: 20080292102
    Abstract: 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: Application
    Filed: May 25, 2007
    Publication date: November 27, 2008
    Inventors: Shuoqin Wang, Daniel M. Zehnder, Jeffrey H. Hunt
  • Publication number: 20080232589
    Abstract: 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: Application
    Filed: March 19, 2007
    Publication date: September 25, 2008
    Applicant: Harris Corporation
    Inventors: Mark Chamberlain, John Alvermann, Leonard Picone
  • Publication number: 20080144827
    Abstract: 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: Application
    Filed: December 18, 2006
    Publication date: June 19, 2008
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Brent L. Davis, Peeyush Jaiswal, Naveen Narayan
  • Patent number: 7362867
    Abstract: 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: Grant
    Filed: July 7, 2000
    Date of Patent: April 22, 2008
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Jae-Yoel Kim, Hee-Won Kang
  • Publication number: 20080037788
    Abstract: 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: Application
    Filed: July 23, 2007
    Publication date: February 14, 2008
    Applicant: FUJITSU LIMITED
    Inventors: Taro Togawa, Kaori Endo, Takeshi Otani, Masakiyo Tanaka, Yasuji Ota
  • Patent number: 7308104
    Abstract: 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: Grant
    Filed: August 15, 2000
    Date of Patent: December 11, 2007
    Assignee: LG Information & Communications, Ltd.
    Inventors: Ki Jun Kim, Young Jo Lee, Young Cho Kim
  • Patent number: 7184952
    Abstract: 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: Grant
    Filed: July 12, 2006
    Date of Patent: February 27, 2007
    Assignee: Applied Minds, Inc.
    Inventors: W. Daniel Hillis, Bran Ferren, Russel Howe