Plural Carrier Frequencies Patents (Class 380/34)
  • Patent number: 9876529
    Abstract: A method and apparatus for providing information about an encrypted signal transmitted by a satellite in a satellite navigation system are disclosed. A data sequence of the encrypted signal as transmitted is obtained, a signal sample is extracted from the data sequence, the signal sample including a part of the data sequence having a length less than a total length of the data sequence, and the signal sample and information about when the data included in the signal sample was transmitted by the satellite are transmitted, as the encrypted signal information, to a receiver for use in the satellite navigation system. A method and apparatus for authenticating an unencrypted signal based on the encrypted signal information are also disclosed.
    Type: Grant
    Filed: May 31, 2013
    Date of Patent: January 23, 2018
    Assignee: AIRBUS DEFENCE AND SPACE LIMITED
    Inventor: Michael Charles Turner
  • Patent number: 9787426
    Abstract: A system architecture for managing resources in a communication network comprises in combination at least the following elements: a plurality of radio equipments working in a given frequency band and with identical frequency hopping rules; the radio equipments are managed by a master device; and a radio equipment comprises at least: a radiocommunication module that carries the radiocommunications; a module suitable for tapping, monitoring and intercepting radio signals in the environment and for recording them locally in a database; a module suitable for disrupting non-authorized communications; and a local “3 in 1” management module receiving the orders emitted by the master device, the management module being suitable for controlling the various modules of the radio equipment; a radio-router module; and a tapping and monitoring module.
    Type: Grant
    Filed: November 13, 2015
    Date of Patent: October 10, 2017
    Assignee: THALES
    Inventors: Bertrand Franck, Dominique Merel
  • Patent number: 9614695
    Abstract: The present invention provides a method. The method includes: performing coupling to acquire a first reference signal and a second reference signal from a transmit signal transmitted on a same transmit link at a transmit end; performing signal recombination according to the first reference signal and the second reference signal, to obtain a first interference cancellation signal and a second interference cancellation signal; enabling the first interference cancellation signal to pass through a simulated interference channel, and enabling the second interference cancellation signal to pass through the simulated interference channel; and coupling and output, to a same receive link at the local receive end, the first interference cancellation signal and the second interference cancellation signal that have passed through the simulated interference channel, and combining the first interference cancellation signal and the second interference cancellation signal with a signal received by the local receive end.
    Type: Grant
    Filed: September 29, 2016
    Date of Patent: April 4, 2017
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Yu Liu, Cheng Hong, Meng Cai, Hongli Jiang
  • Patent number: 9106366
    Abstract: Provided are techniques for distributing data in a trackable manner while suppressing an increase in the size of data to be distributed as much as possible and minimizing interruption of usage of the data. A method for distributing data to multiple clients from a server includes the steps of: generating a common noise by using noises unique to the multiple clients, respectively; embedding the common noise in the data to be distributed to make the data unusable; and distributing the data containing the embedded common noise, so that the data containing the embedded common noise is made usable by each of the multiple clients using a unique noise generated in the client.
    Type: Grant
    Filed: December 13, 2012
    Date of Patent: August 11, 2015
    Assignee: International Business Machines Corporation
    Inventors: Kohichi Kamijoh, Hisashi Miyashita, Hiroaki Nakamura
  • Patent number: 8850204
    Abstract: A method is described for negotiating the use of multi-link ciphering and for the generation of unique keys for each of the links using a single 4-way handshake protocol exchange.
    Type: Grant
    Filed: December 23, 2009
    Date of Patent: September 30, 2014
    Assignee: Intel Corporation
    Inventors: Robert Stacey, Jesse Walker, Emily H. Qi
  • Patent number: 8848904
    Abstract: The replacement of secret keys is a central problem in key management. Typical solutions exchange handshaking messages, involve complex computations, or require the cooperation of trusted third parties. Disclosed herein is a key replacement method that exploits the randomness of Markov models to efficiently provide fresh keys to users. Unlike other methods, the proposed method removes the need for extra communications, intensive computation, or third parties. It is demonstrated that the proposed method has perfect forward secrecy as well as resistance to known-key attacks.
    Type: Grant
    Filed: October 23, 2009
    Date of Patent: September 30, 2014
    Assignees: University of Maryland, College Park, The United States of America as represented by Secretary of the Army
    Inventors: John S. Baras, Paul L. Yu, Brian M. Sadler
  • Patent number: 8768570
    Abstract: A wheel suspension system for a three-wheeled motorcycle or “trike” includes parallel wheels mounted on vertically pivoting suspension arms governed by hydraulic pistons. The pistons have upper liquid reservoirs that are interconnected through a valve system, which interconnects the upper reservoirs when the trike is in motion, allowing opposing vertical wheel movements when banking through turns, and prevents liquid exchange when the trike is stopped, thereby holding the motorcycle upright, Embodiments include a manual and/or automatic valve control. A threshold switching speed for an automatic controller can be factory set and/or user adjustable. The pistons can include directly interconnected lower fluid reservoirs. A shock-absorbing reservoir can allow transient vertical movement of both wheels to absorb shocks. A cover system can emulate the appearance of saddle bags and can appear to be covering only a single wheel.
    Type: Grant
    Filed: August 7, 2013
    Date of Patent: July 1, 2014
    Inventor: Steven P Young
  • Patent number: 8769312
    Abstract: Tampering monitoring system can detect whether protection control module is tampered with even if some of detection modules are tampered with. Tampering monitoring system includes protection control module detection modules, and management device. Protection control module includes: generation unit generating d pieces of distribution data from computer program, n and d being positive integers, d smaller than n; selection unit selecting d detection modules; and distribution unit distributing d pieces of distribution data to d detection modules. Each detection module judges whether received piece of distribution data is authentic to detect whether protection control module is tampered with, and transmits judgment result indicating whether protection control module is tampered with. Management device receives judgment results from d detection modules and manages protection control module with regard to tampering by using received judgment results.
    Type: Grant
    Filed: October 19, 2011
    Date of Patent: July 1, 2014
    Assignee: Panasonic Corporation
    Inventors: Yuji Unagami, Yuichi Futa, Natsume Matsuzaki, Hiroki Shizuya, Eisuke Koizumi, Shingo Hasegawa
  • Patent number: 8582761
    Abstract: A method determines an elliptical curve, suitable for a cryptographic method. An elliptical curve to be tested is prepared. The order of a twisted elliptical curve associated with the elliptical curve to be tested is determined. It is automatically checked whether the order of the twisted elliptical curve is a strong prime number. If the order of the twisted elliptical curve is a strong prime number, the elliptical curve to be tested is selected as an elliptical curve suitable for cryptographical methods.
    Type: Grant
    Filed: March 6, 2007
    Date of Patent: November 12, 2013
    Assignee: Siemens Aktiengesellschaft
    Inventors: Jean Georgiades, Anton Kargl, Bernd Meyer
  • Publication number: 20130266136
    Abstract: Embodiments are directed to switching of stations STA, access points APs and PCPs that are communicating through a wireless link from one frequency band to another. One embodiment is directed to switching of stations STA that are communicating through a tunneled direct link setup (TDLS) link from one frequency band to another. A multiband element may be added to a TDLS discovery request and TDLS discovery response frames to allow each of the stations communications through a TDLS to determine if the other station has multiband capability. In one embodiment, a pairwise transient key (PTK) is created for both a current band in which the stations STA are communicating and a new band over which the stations may communicate in the future. In this way there is no need to calculate a new pairwise transient key PTK for the new frequency band.
    Type: Application
    Filed: April 16, 2012
    Publication date: October 10, 2013
    Applicant: STMICROELECTRONICS, INC.
    Inventors: LIWEN CHU, GEORGE A. VLANTIS
  • Patent number: 8478526
    Abstract: A method is described that allows a first mobile device to persistently lock onto a second mobile device, thereby allowing the first mobile device to not only constantly monitor the dynamic location of the second mobile device but also to adaptively navigate in real-time to the dynamic location associated with the second mobile device. The dynamic location may include a current location of the second mobile device or a final destination for travel of the second mobile device.
    Type: Grant
    Filed: February 8, 2012
    Date of Patent: July 2, 2013
    Assignee: Cellco Partnership
    Inventors: Monica Chitre, Deepa Sukumaran
  • Patent number: 8472622
    Abstract: A wireless communication method for transmitting information to the designated region with the boundary defined by the sharp cutoff is provided. Receivers outside the designated region are excluded from retrieving the encoded information. The boundary of designated region is adjustable. The wireless communication method can be applied to clearly defining the accepted region and rejection region in satellite communications. The wireless communication method includes steps of providing an information; encoding the information into an encoded data regarding a designated bit-energy-to-noise-ratio; transmitting the encoded data to form a virtual antenna radiation pattern covering a designated region with boundary defined by the sharp cutoff based on the designated bit-energy-to-noise-ratio; receiving the encoded data; and decoding the encoded data into the original information only when receivers within the designated region with bit-energy-to-noise-ratio no less than the designated bit-energy-to-noise-ratio.
    Type: Grant
    Filed: March 10, 2009
    Date of Patent: June 25, 2013
    Assignee: National Applied Research Laboratories
    Inventors: Chieh-Fu Chang, Wan-Hsin Hsieh, Ming-Seng Kao
  • Patent number: 8443083
    Abstract: Multiple applications sharing common resources are arbitrated such that failures resulting from unavailable resources can be avoided. Whenever an application (e.g., a data application) desires to perform an operation (e.g., PPP resynchronization) that requires the use of a shared resource (e.g., an RF receiver), a determination is made as to whether that resource is available. The operation may be delayed while the resource is unavailable. The application may be assigned the resource if it is available or becomes available and may then start the operation. The resource is locked while the operation is pending to avoid assignment to another application. The resource arbitration allows applications to complete their operations without encountering failures due to other applications taking over the resources.
    Type: Grant
    Filed: April 27, 2006
    Date of Patent: May 14, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Sanjeev Khushu, Sriram Nagesh Nookala, Simon Turner, Uppinder Singh Babbar
  • Patent number: 8442220
    Abstract: A base station generates a unicast channel, a MBMS channel, and a pilot channel, that are multiplied by a scrambling code specific to a particular cell. The pilot channel is replicated as necessary. The unicast channel and the MBMS channel are time-multiplexed. For data in a unit transmission frame, a same frequency component is multiplied by a same scrambling code.
    Type: Grant
    Filed: February 7, 2007
    Date of Patent: May 14, 2013
    Assignee: NTT DoCoMo, Inc.
    Inventors: Yoshihisa Kishiyama, Kenichi Higuchi, Mamoru Sawahashi
  • Patent number: 8433900
    Abstract: A request to receive multicast data, associated with a multicast group, may be transmitted. The request may be transmitted via a tunnel. Group keys may be received in response to the request. The group keys may be based on the multicast group. An encapsulated packet may be received via another tunnel. The encapsulated packet may be processed, using the group keys, to obtain a multicast packet associated with the multicast data. The multicast packet may be forwarded to at least one multicast recipient.
    Type: Grant
    Filed: November 30, 2011
    Date of Patent: April 30, 2013
    Assignee: Juniper Networks, Inc.
    Inventors: Gregory M. Lebovitz, Changming Liu, Choung-Yaw Shieh
  • Patent number: 8312551
    Abstract: A method is provided for tamper detection of a transmitted signal. The method is comprised of generating a first digital data signal having a first data rate. The method is also comprised of generating a second digital data signal having a second data rate. The method is further comprised of concurrently transmitting the first digital data signal at a first carrier frequency using a first modulation format and the second digital data signal at a second carrier frequency using a second modulation format. The method includes selecting the second carrier frequency and a bandwidth of the second digital data signal so that the second digital data signal is contained within a frequency spectrum defined by a bandwidth of the first digital data signal. The method also includes verifying an integrity of the first digital data signal at a remote receiver based on defection at the remote receiver of the second digital data signal. A system (100) is also provided for generating a tamper-protected transmitted signal.
    Type: Grant
    Filed: February 15, 2007
    Date of Patent: November 13, 2012
    Assignee: Harris Corporation
    Inventor: David B. Chester
  • Patent number: 8270600
    Abstract: A disclosed base station randomizes downlink physical channels in OFDM radio access by scrambling codes suitable for the respective physical channels. The base station includes a base-station-specific scrambling code generating unit configured to generate a base-station-specific scrambling code for randomizing downlink physical channels; a sector-specific orthogonal sequence generating unit configured to generate a sector-specific orthogonal sequence; and a multiplication control unit configured to determine, for each of the physical channels, whether to multiply the base-station-specific scrambling code by the sector-specific orthogonal sequence based on whether each of the physical channels requires soft combining.
    Type: Grant
    Filed: October 1, 2007
    Date of Patent: September 18, 2012
    Assignee: NTT DoCoMo, Inc.
    Inventors: Yoshihisa Kishiyama, Kenichi Higuchi, Mamoru Sawahashi
  • Patent number: 8145417
    Abstract: A method is described that allows a first mobile device to persistently lock onto a second mobile device, thereby allowing the first mobile device to not only constantly monitor the dynamic location of the second mobile device but also to adaptively navigate in real-time to the dynamic location associated with the second mobile device. The dynamic location may include a current location of the second mobile device or a final destination for travel of the second mobile device.
    Type: Grant
    Filed: December 31, 2008
    Date of Patent: March 27, 2012
    Assignee: Cellco Partnership
    Inventors: Monica Chitre, Deepa Sukumaran
  • Patent number: 8139682
    Abstract: Methods and apparatus, including computer program products, are provided for channel estimation. In one aspect, there is provided a receiver including a demodulator for decoding a signal including at least one of a transmission parameter signaling (TPS) carrier and a data carrier. The receiver further includes a channel estimator, coupled to the demodulator, for determining a channel estimate for the TPS carrier. Moreover, the receiver includes an interpolator, coupled to the channel estimator, for determining, based on the determined channel estimate for the TPS carrier, another channel estimate for the data carrier. Related systems, methods, and articles of manufacture are also disclosed.
    Type: Grant
    Filed: December 20, 2007
    Date of Patent: March 20, 2012
    Assignee: Advanced Micro Devices
    Inventor: Ravikiran Rajagopal
  • Patent number: 8130948
    Abstract: A method and system enables the selective addressing of groups of broadcast receivers within part of a satellite footprint. It uses two satellites having a common transmission band to transmit respective signals, and at receivers in the footprint the phases of the signals received from the two satellites are compared. This phase difference is dependent upon receiver location, but by measuring phase difference no absolute timing or phase measurement is required. A common key is generated at the receivers in a certain area. The output of selected receivers is fed back to the broadcast control centre and is used to encode the location-based services for that area. Preferably the operation is conducted on multiple frequencies and in multiple rounds of such frequencies. A multibit keyword can be directly generated at the receivers by use of a discrete Fourier transform (DFT) and combining its outputs for different rounds.
    Type: Grant
    Filed: August 3, 2006
    Date of Patent: March 6, 2012
    Assignee: British Broadcasting Corporation
    Inventor: Nigel Christopher Earnshaw
  • Patent number: 8132000
    Abstract: Secure tunneled multicast transmission and reception through a network is provided. A join request may be received from a second tunnel endpoint, the join request indicating a multicast group to be joined. Group keys may be transmitted to the second tunnel endpoint, where the group keys are based at least on the multicast group. A packet received at the first tunnel endpoint may be cryptographically processed to generate an encapsulated payload. A header may be appended to the encapsulated payload to form an encapsulated packet, wherein the header includes information associated with the second tunnel endpoint. A tunnel may be established between the first tunnel endpoint and the second tunnel endpoint based on the appended header. The encapsulated packet may be transmitted through the tunnel to the second tunnel endpoint. The second tunnel endpoint may receive the encapsulated packet. Cryptographic processing of the encapsulated packet may reveal the packet having a second header.
    Type: Grant
    Filed: July 30, 2009
    Date of Patent: March 6, 2012
    Assignee: Juniper Networks, Inc.
    Inventors: Gregory M Lebovitz, Changming Liu, Choung-Yaw Shieh
  • Patent number: 8117449
    Abstract: A method for detecting a communication relay attack involves the steps of counting a number of clock cycles occurring in a clock signal between transmission of two predetermined elements of data with a data transmission device, counting a number of clock cycles occurring in the clock signal between receipt of the two predefined elements of data and comparing the number of clock cycles counted by the data transmission device with the number of clock cycles counted by the data receiving device.
    Type: Grant
    Filed: December 27, 2007
    Date of Patent: February 14, 2012
    Assignee: MasterCard International, Inc.
    Inventor: Simon Blythe
  • Patent number: 8023654
    Abstract: A method for securing human to human communication over a network includes receiving, by a first computer, an incoming authenticated data stream from a second computer over a first communication channel, the incoming authenticated data stream having been computed using an incoming digital experiential data stream and a first imprint, and extracting the first imprint from the incoming authenticated data stream. The incoming authenticated data stream is then presented for sensory experience by a human. An outgoing digital experiential data stream is then input and the method computes a second imprint associated with the first computer and computes an outgoing authenticated data stream using the outgoing digital experiential data stream and the second imprint. A second communication channel is then secured from the first computer to the second computer using the first imprint, the second communication channel suitable for sending the outgoing authenticated data stream to the second computer.
    Type: Grant
    Filed: December 18, 2006
    Date of Patent: September 20, 2011
    Assignee: Palo Alto Research Center Incorporated
    Inventors: Paul J. Stewart, Dirk Balfanz, Glenn E. Durfee, Diana K. Smetters
  • Patent number: 8005501
    Abstract: Entertainment content is stored in a memory. The content can be audio or video or both. According to an aspect, encryption is keyed to the disc contents to produce a cryptographically created value. That cryptographically created value is based on the content on the memory along with the cryptographic operation. The cryptographic value can be used to determine if data on the memory is valid. One aspect of the memory can be an optical disc. Another aspect carries this out only for recorded discs and does not do this for prerecorded discs.
    Type: Grant
    Filed: July 10, 2007
    Date of Patent: August 23, 2011
    Inventor: Scott C. Harris
  • Patent number: 8000475
    Abstract: A system and method for providing an encrypted media stream to clients includes a plurality of remote multiple media stream manager and provider (RMP) units to receive a plurality of source media streams. The RMP units modulate the source media streams to provide a plurality of modulated media streams; encrypt the modulated media streams to provide a plurality of encrypted and modulated media streams; de-modulate the encrypted and modulated media streams to provide a plurality of encrypted and demodulated media streams; and transmit the encrypted and demodulated media streams over a high speed network.
    Type: Grant
    Filed: December 23, 2003
    Date of Patent: August 16, 2011
    Assignee: Bigband Networks Inc.
    Inventor: Ron Guman
  • Patent number: 7996687
    Abstract: Multiple logical partitions are provided in a data processing system. A unique context is generated for each one of the logical partitions. When one of the logical partitions requires access to the hardware TPM, that partition's context is required to be stored in the hardware TPM. The hardware TPM includes a finite number of storage locations, called context slots, for storing contexts. Each context slot can store one partition's context. Each one of the partitions is associated with one of the limited number of context storage slots in the hardware TPM. At least one of the context slots is simultaneously associated with more than one of the logical partitions. Contexts are swapped into and out of the hardware TPM during runtime of the data processing system so that when ones of the partitions require access to the hardware TPM, their required contexts are currently stored in the hardware TPM.
    Type: Grant
    Filed: October 31, 2008
    Date of Patent: August 9, 2011
    Assignee: International Business Machines Corporation
    Inventors: Richard Louis Arndt, Steven A. Bade, Thomas J. Dewkett, Charles W. Gainey, Jr., Nia Letise Kelley, Siegfried Sutter, Helmut H. Weber
  • Publication number: 20110154038
    Abstract: A method is described for negotiating the use of multi-link ciphering and for the generation of unique keys for each of the links using a single 4-way handshake protocol exchange.
    Type: Application
    Filed: December 23, 2009
    Publication date: June 23, 2011
    Inventors: Emily H. Qi, Jesse Walker, Robert Stacey
  • Patent number: 7936872
    Abstract: A system and method in a wireless network for discovering which resources (e.g., other wireless computing devices) are proximate a user's wireless computing device. Wireless signal strengths with respect to various base stations are compared with the signal strengths of other network devices or resources, to determine which devices are experiencing similar signal strengths. Devices with similar signal strengths are deemed proximate. Each participating computing device may send its signal strength reports to a proximity server, which distributes proximity data to network clients. Each client may receive and process the signal strength data for determining which other clients/resources are proximate, or the server can perform proximity computations and return a list of proximate clients. Once computed, the identities of the proximate clients can be used to query for additional data about the clients, such as the names and other details of their owners, or information about the resource.
    Type: Grant
    Filed: September 30, 2003
    Date of Patent: May 3, 2011
    Assignee: Microsoft Corporation
    Inventors: John C. Krumm, Susan D. Woolf, Roland Fernandez, David J. Marsh, Albert D. Jee, Wayne G. King
  • Patent number: 7787621
    Abstract: A method, apparatus and computer program product for transmitting data secures the data by adaptively transforming it and spreading the transformed data piecewise over plural transmission channels. The method, apparatus and computer program product may select low-cost channels preferentially to transmit greater amounts of the data; may disorder the data and transmit ordering information separately over a preferred channel of higher security; may conceal data in a lower-security channel by steganographic methods; and may conceal the sequence of the data by placing segments of it statically, for example, in a WWW website, while providing sequencing data on the preferred channel of higher security. A receiving method, apparatus and computer program product may also be provided for recovering information content from signals on the plural channels.
    Type: Grant
    Filed: October 30, 2007
    Date of Patent: August 31, 2010
    Assignee: International Business Machines Corporation
    Inventors: Gary Paul Noble, Peter John Stretton
  • Patent number: 7774602
    Abstract: The present invention provides a method and system for secure access to computer equipment. An embodiment includes a secure access controller connected to a link between a transceiver (such as a modem) and the computer equipment. Public and private keys are used by the secure access controller and a remote user. The keys are provided to the secure access controller by an authentication server. Once the transceiver establishes a communication link with the user, the access controller uses these keys to authenticate packets issued by the user to the computer equipment. If the packet is authenticated, the access controller passes the packet to the computer equipment. Otherwise, the packet is discarded. Another embodiment includes a secure access controller having a plurality of ports for connection to a plurality of different pieces of computer equipment. The secure access controller thus intermediates communications between the modem and the plurality of different pieces of computer equipment.
    Type: Grant
    Filed: December 9, 2005
    Date of Patent: August 10, 2010
    Assignee: BCE Inc.
    Inventors: William G. O'Brien, Tet Hin Yeap, Dafu Lou
  • Patent number: 7760792
    Abstract: An assembly of simultaneously transmitted electrically generated signals, which contains a subset of binary spreading-code sequences that are members of a larger set of binary spreading-code sequences available to a particular node of a multi-node communication network. All sequences in the set of spreading-code sequences available to the particular node of the network can be generated by the same configuration of two linear-feedback binary shift registers, where feedback taps of the two linear-feedback binary shift registers correspond to primative polynomials of the same degree over GF(2), the field of two elements.
    Type: Grant
    Filed: January 12, 2001
    Date of Patent: July 20, 2010
    Inventor: Bart F. Rice
  • Patent number: 7746939
    Abstract: A spectral notch modulation technique for encoding information in a signal involves transforming the signal into the frequency domain via a fast Fourier transform (FFT) of length N, such that the signal is represented by N frequency bins, selectively nulling M of the N frequency bins, where nulled combinations of M frequency bins respectively correspond to encoded information bits, transforming the selectively nulled signal to the time domain via an inverse FFT, and transmitting the selectively nulled signal. At the receiving end, the signal is demodulated to recover the encoded information by transforming the signal into the frequency domain via a fast Fourier transform (FFT) of length N, identifying the set of M nulled frequency bins among the N frequency bins, and converting the set of M nulled frequency bins to corresponding information bits.
    Type: Grant
    Filed: July 29, 2005
    Date of Patent: June 29, 2010
    Assignee: ITT Manufacturing Enterprises, Inc.
    Inventor: Dennis D. McCrady
  • Patent number: 7630492
    Abstract: A process for distributing digital audio sequences according to a nominal flux format including a succession of fields, each of which includes at least one digital block clusterizing a selected number of coefficients corresponding to single audio elements that are digitally coded inside the flux and utilized by audio decoders that are able to play it to be able to decode it correctly, including a preparatory step including modifying at least one of the coefficients, and a transmission step including a primary flux in compliance with a nominal format including blocks that were modified during the preparatory step and by a route separated from the primary flux by an additional piece of digital information which allows reconstruction of the original flux starting with a calculation, on recipient equipment, as a function of the primary flux and of the additional information.
    Type: Grant
    Filed: March 29, 2005
    Date of Patent: December 8, 2009
    Inventors: Daniel Lecomte, Daniela Parayre-Mitzova
  • Patent number: 7624283
    Abstract: A computer implemented method for recovering a partition context in the event of a system or hardware device failure. Upon receiving a command from a partition to modify context data in a trusted platform module (TPM) hardware device, a trusted platform module input/output host partition (TMPIOP) provides an encrypted copy of the context data and the command to the TPM hardware device, which processes the command and updates the context data. If the TPM hardware device successfully processes the command, the TMPIOP receives the updated context data from the TPM hardware device and stores the updated context data received in encrypted form in a context data cache or a non-volatile storage off-board the TPM hardware device. If the TPM hardware device fails to successfully process the command, the TMPIOP uses a last valid copy of the context data to retry processing of the command on a different TPM hardware device.
    Type: Grant
    Filed: February 13, 2006
    Date of Patent: November 24, 2009
    Assignee: International Business Machines Corporation
    Inventors: Steven A. Bade, Thomas J. Dewkett, Nia L. Kelley, Siegfried Sutter, Helmut H. Weber
  • Patent number: 7613298
    Abstract: A process for distributing digital video sequences in accordance with a nominal stream format including a succession of frames, each frame including at least one digital block regrouping a plurality of coefficients corresponding to simple, digitally coded visual elements is disclosed.
    Type: Grant
    Filed: March 28, 2005
    Date of Patent: November 3, 2009
    Assignee: Medialive
    Inventors: Daniel LeComte, Pierre Sarda, Daniela Parayre-Mitzova, Sébastien Georges
  • Patent number: 7602917
    Abstract: The invention relates to a method of ciphering data transmission in a radio system, and to a user equipment using the method, and to a radio network subsystem using the method. The method includes the steps of: (602) generating a ciphering key; (604A) producing a ciphering mask in a ciphering algorithm using the ciphering key as an input parameter; (604B) using a logical channel specific parameter or a transport channel specific parameter as an additional input parameter to the ciphering algorithm; and (606) producing ciphered data by applying the ciphering mask to plain data.
    Type: Grant
    Filed: December 15, 2004
    Date of Patent: October 13, 2009
    Assignee: Nokia Corporation
    Inventors: Jukka Vialen, Fabio Longoni
  • Patent number: 7587591
    Abstract: Secure tunneled multicast transmission and reception through a network is provided. A join request may be received from a second tunnel endpoint, the join request indicating a multicast group to be joined. Group keys may be transmitted to the second tunnel endpoint, where the group keys are based at least on the multicast group. A packet received at the first tunnel endpoint may be cryptographically processed to generate an encapsulated payload. A header may be appended to the encapsulated payload to form an encapsulated packet, wherein the header includes information associated with the second tunnel endpoint. A tunnel may be established between the first tunnel endpoint and the second tunnel endpoint based on the appended header. The encapsulated packet may be transmitted through the tunnel to the second tunnel endpoint. The second tunnel endpoint may receive the encapsulated packet. Cryptographic processing of the encapsulated packet may reveal the packet having a second header.
    Type: Grant
    Filed: October 29, 2004
    Date of Patent: September 8, 2009
    Assignee: Juniper Networks, Inc.
    Inventors: Gregory M. Lebovitz, Changming Liu, Choung-Yaw Shieh
  • Publication number: 20090168997
    Abstract: A method for detecting a communication relay attack involves the steps of counting a number of clock cycles occurring in a clock signal between transmission of two predetermined elements of data with a data transmission device, counting a number of clock cycles occurring in the clock signal between receipt of the two predefined elements of data and comparing the number of clock cycles counted by the data transmission device with the number of clock cycles counted by the data receiving device.
    Type: Application
    Filed: December 27, 2007
    Publication date: July 2, 2009
    Inventor: Simon Blythe
  • 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
  • Publication number: 20090103720
    Abstract: Invention presented here relates to Low Probability of Exploitation and Anti Jamming communication system offering high spectral efficiency. The object of the present invention is achieved by hopping in polarization domain and by employing an adaptive polarization-nulling algorithm (FIG. 18, H [2,2]) to detect and eliminate jamming signal. The use of signals which hops or spreads in polarization domain does not need wide frequency spectrum due to which, the said modulation when employed at the physical layer offers and extremely secure and survivable wireless communication at very high data rates.
    Type: Application
    Filed: June 7, 2005
    Publication date: April 23, 2009
    Inventor: Manoj Karayil Thekkoott Narayanan
  • Patent number: 7478246
    Abstract: A method is described for implementing a trusted computing environment within a data processing system where the data processing system includes a single hardware trusted platform module (TPM). Multiple logical partitions are provided in the data processing system. A unique context is generated for each one of the logical partitions. When one of the logical partitions requires access to the hardware TPM, that partition's context is required to be stored in the hardware TPM. The hardware TPM includes a finite number of storage locations, called context slots, for storing contexts. Each context slot can store one partition's context. Each one of the partitions is associated with one of the limited number of context storage slots in the hardware TPM. At least one of the context slots is simultaneously associated with more than one of the logical partitions.
    Type: Grant
    Filed: July 29, 2004
    Date of Patent: January 13, 2009
    Assignee: International Business Machines Corporation
    Inventors: Richard Louis Arndt, Steven A. Bade, Thomas J. Dewkett, Charles W. Gainey, Jr., Nia Letise Kelley, Siegfried Sutter, Helmut H. Weber
  • Publication number: 20080291975
    Abstract: An approach is provided for operating a radio network, wherein the operating frequency is varied systematically according to an enciphered sudden-frequency-change scheme and retained only during a hop. Several hops are combined to form a service interval, a service window being arranged at a variable position within the service interval. Given hops for different functionalities (late traffic entry, break-in, hailing, late network entry) of the radio network are specified in the service window.
    Type: Application
    Filed: June 3, 2005
    Publication date: November 27, 2008
    Applicant: Rohde & Schwarz SIT GmbH
    Inventors: Dieter Sorgel, Ingo Voll
  • Patent number: 7415043
    Abstract: A spread spectrum method and apparatus for protecting and authenticating wirelessly transmitted digital information using numerous techniques. The apparatus may be a wireless code division multiple access (CDMA) communication system, a base station, a wireless transmit/receive unit (WTRU), a transmitter, a receiver and/or an integrated circuit (IC). The wireless CDMA communication system includes a transmitter which steganographically embeds digital information in a CDMA communication signal and wirelessly transmits the CDMA communication signal. The system further includes a receiver which receives the CDMA communication signal and extracts the steganographically embedded digital information from the received CDMA communication signal.
    Type: Grant
    Filed: January 13, 2005
    Date of Patent: August 19, 2008
    Assignee: InterDigital Technology Corporation
    Inventors: John David Kaewell, Jr., Prabhakar R. Chitrapu, Robert Lind Olesen, Sung-Hyuk Shin, John Erich Hoffmann, Alexander Reznik
  • Publication number: 20080144815
    Abstract: A multi-band radio having seamless satellite communication capability is provided. The radio includes: a user interface for controlling operations of the radio; an encryption module; a LOS wireless transceiver for transmitting encrypted data at a frequency in the radio frequency spectrum; a BLOS wireless transceiver for transmitting encrypted data at a frequency in the microwave frequency spectrum; and a router for routing the encrypted data to at least one of the LOS transceiver and the BLOS transceiver.
    Type: Application
    Filed: December 15, 2006
    Publication date: June 19, 2008
    Inventors: Charles Richards, Tim Klembczyk, Tom Kenney, George Helm
  • 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
  • Patent number: 7356141
    Abstract: A encoding/decoding method and device for a remote controller utilizing a baud rate to encrypt data for transmission. The encoding device includes an encoder encoding an identification code into an encrypted code; and an interpreter interpreting the un-encoded portion of the identification code and the encrypted code into a transmission signal. When the encrypted code is in a first base, the plain code corresponding to the encrypted code will be transmitted with a first baud rate; and when the encrypted code is in a second base, the plain code corresponding to the encrypted code will be transmitted with a second baud rate. The decoding device includes a receiver receiving the transmission signal; a interpreter connected to the receiver interpreting the transmission signal into a received signal; an encoder utilizing the same encoding algorithm as in the transmitter to generate a comparison code; and a processor comparing the received signal and the comparison code.
    Type: Grant
    Filed: July 1, 2003
    Date of Patent: April 8, 2008
    Assignee: Holtek Semiconductor Inc.
    Inventors: Ian Hsieh, Jason Tsai
  • Patent number: 7239666
    Abstract: A communication system that can satisfactorily communicate with a mobile station by a transmitter and receiver of a simple arrangement wherein a plurality of carriers having different frequencies are transmitted simultaneously and data is transmitted on the basis of a phase difference between the carriers. Also, the carriers are multiplied with a predetermined time waveform and transmitted, so that a reception side receives data by use of a time waveform narrower than the above time waveform.
    Type: Grant
    Filed: February 13, 1998
    Date of Patent: July 3, 2007
    Assignee: Sony Corporation
    Inventors: Mitsuhiro Suzuki, Makoto Natori
  • Patent number: RE39759
    Abstract: A time domain communications system wherein a broadband of time-spaced signals, essentially monocycle-like signals, are derived from applying stepped-in-amplitude signals to a broadband antenna, in this case, a reverse bicone antenna. When received, the thus transmitted signals are multiplied by a D.C. replica of each transmitted signal, and thereafter, they are, successively, short time and long time integrated to achieve detection.
    Type: Grant
    Filed: April 30, 2004
    Date of Patent: August 7, 2007
    Assignee: Time Domain Corporation
    Inventor: Larry W. Fullerton
  • Patent number: RE41479
    Abstract: A time domain communications system wherein a broadband of time-spaced signals, essentially monocycle-like signals, are derived from applying stepped-in-amplitude signals to a broadband antenna, in this case, a reverse bicone antenna. When received, the thus transmitted signals are multiplied by a D.C. replica of each transmitted signal, and thereafter, they are, successively, short time and long time integrated to achieve detection.
    Type: Grant
    Filed: April 30, 2004
    Date of Patent: August 10, 2010
    Assignee: Time Domain Corporation
    Inventor: Larry W. Fullerton
  • Patent number: RE42002
    Abstract: An apparatus and method for high speed transmission of data over a transmission line/medium/network telephone, wherein this high speed is achieved by simultaneously, or in a timed and marked relationship, transmitting multiple bits of data over parallel frequencies rather than serially transmitting one bit of data at a time over one frequency.
    Type: Grant
    Filed: July 6, 2006
    Date of Patent: December 14, 2010
    Inventors: William K. Riceman, Robert G. Riceman, Stephen A. Hollock