H04K 1 - Secret communication

Patents for H04K 1 - Secret communication (16,771)
03/1995
03/08/1995	EP0642277A2 Secure telecommunications
02/1995
02/21/1995	US5392357 Secure telecommunications
02/21/1995	US5392354 Cordless phone system capable of scrambling communication signals
02/21/1995	US5392352 Scramble detecting circuit in a satellite broadcasting receiver and scramble detecting method
02/16/1995	WO1995005043A1 Method and apparatus for uniquely encrypting a plurality of services at a transmission site
02/14/1995	CA1334444C Off-premises cable television channel interdiction method and apparatus
02/08/1995	EP0637413A1 Verifying secret keys in a public-key cryptosystem
02/01/1995	EP0636259A1 Cryptographic data security in a secured computer system.
01/1995
01/26/1995	WO1994028654A3 Secure communication system
01/19/1995	WO1994026044A3 Fair cryptosystems and methods of use
01/18/1995	CN1097533A A radio telecommunication apparatus
01/11/1995	EP0633703A2 Recording and/or encoding of video signals
01/10/1995	US5381481 Method and apparatus for uniquely encrypting a plurality of services at a transmission site
01/09/1995	CA2126946A1 Apparatus and method for recording scrambled digital video signals
01/05/1995	WO1995000936A1 Identification beacon
01/03/1995	CA1333819C Method and apparatus for encrypting and decrypting time domain signals
12/1994
12/27/1994	US5377227 Adaptive data recovery for spread spectrum systems
12/20/1994	US5375171 Transmission system, and transmitter and receiver used in the transmission system for transmitting and receiving digital signals containing modulated bit allocation information
12/20/1994	US5375168 Method for scrambling and unscrambling a video signal
12/14/1994	EP0629059A1 Spread spectrum digital transmission system with low frequency pseudorandom coding of the useful information and method for spectrum spreading and compressing used in such a system
12/14/1994	CN1027025C Speech sounds radio calling system
12/10/1994	CA2125444A1 Spread spectrum digital transmission system obtained by a low frequency pseudo-random coding of the useful information and spectrum spreading and compression process used in said system
12/08/1994	WO1994028654A2 Secure communication system
12/07/1994	EP0627821A1 Method and apparatus for interleaving a sequence of data elements
12/07/1994	EP0627142A1 Method and apparatus of controlling processing devices during power transition
12/06/1994	US5371794 Method and apparatus for privacy and authentication in wireless networks
11/1994
11/22/1994	US5367516 Method and apparatus for signal transmission and reception
11/15/1994	US5365585 Method and apparatus for encryption having a feedback register with selectable taps
11/15/1994	US5365264 Video network system with computer LAN
11/10/1994	WO1994026044A2 Fair cryptosystems and methods of use
11/09/1994	EP0624014A2 Personal date/time notary device
11/02/1994	EP0491840A4 Signal digitizing method and system
10/1994
10/18/1994	CA2033983C System and method for communications security protection
10/13/1994	WO1994023507A1 Generation of optical signals with rf components
10/11/1994	US5355415 Parallel distributed sample scrambling system
10/04/1994	US5353351 Secure teleconferencing
09/1994
09/29/1994	WO1994022257A1 Secure access telephone extension system and method
09/29/1994	WO1994022236A1 Method and apparatus for signal transmission and reception
09/28/1994	EP0617528A2 Radio telecommunication apparatus with privacy or non-privacy communication mode
09/21/1994	EP0615673A1 Method and apparatus for data encryption and transmission
09/15/1994	WO1994021065A1 Method and apparatus for coherent communication in a spread-spectrum communication system
09/06/1994	US5345468 Despreading technique for CDMA systems
08/1994
08/30/1994	CA1331790C Reproduction of secure keys by using distributed key generation data
08/23/1994	US5341423 Masked data transmission system
08/23/1994	CA1331644C Scrambled communication system using adaptive transversal filters for descrambling received signals
08/04/1994	WO1994017602A1 Compound pn code tracking system
08/02/1994	US5335279 Digital voice-band spectrum inversion apparatus
08/02/1994	US5335277 Signal processing appparatus and methods
07/1994
07/12/1994	US5329547 Method and apparatus for coherent communication in a spread-spectrum communication system
06/1994
06/23/1994	WO1994014260A1 Communications using synchronized chaotic systems
06/22/1994	EP0602843A2 Despreading technique for CDMA systems
06/15/1994	CN1088035A 信号分配系统 Signal distribution system
06/09/1994	WO1994013079A1 Method and apparatus of controlling processing devices during power transition
06/07/1994	US5319706 Synchronizing circuit
05/1994
05/24/1994	US5315658 Fair cryptosystems and methods of use
05/21/1994	CA2103304A1 Spread spectrum communication system
05/18/1994	EP0596894A1 Dynamic encryption key selection for encrypted radio transmissions
05/11/1994	WO1994010775A1 A multiplex control packet for digital services
05/11/1994	CA2148270A1 A multiplex control packet for digital services
05/10/1994	US5311323 Video signal recording system
04/1994
04/28/1994	DE4334931A1 Empfänger Receiver
04/26/1994	US5307370 Secure cordless radio-telephone
04/19/1994	US5305384 Digital encryption device
04/13/1994	EP0592233A1 Scramble system for prevention illegal user
04/05/1994	US5301245 System for transmitting a commercial program in a CATV system
03/1994
03/30/1994	CN1084687A Telephone set
03/29/1994	US5299229 High rate-low rate PN code tracking system
03/29/1994	US5299227 Individual beacon identification system
03/22/1994	US5297201 System for preventing remote detection of computer data from tempest signal emissions
03/22/1994	CA1328008C Video scrambling by segmenting video information lines
03/17/1994	WO1994006228A1 Adaptive data recovery for spread spectrum systems
03/08/1994	US5293423 Synchronizing method in a mobile radio system
03/01/1994	US5291555 Communication using synchronized chaotic systems
02/1994
02/23/1994	EP0583241A1 Spread spectrum correlator
02/22/1994	US5289498 Adaptive data recovery for spread spectrum systems
02/15/1994	CA1327073C Method and apparatus for improving video scrambling and employing split sync pulses
02/01/1994	US5283831 Method of synchronizing the pseudo-random binary sequence in a descrambler
01/1994
01/18/1994	US5280529 Communication network intended for secure transmissions
01/11/1994	US5278907 Method of transmitting communications
01/06/1994	WO1993021581A3 Cryptographic data security in a secured computer system
01/04/1994	US5276737 Fair cryptosystems and methods of use
01/04/1994	US5276735 Data enclave and trusted path system
01/04/1994	US5276734 Oscillator system
12/1993
12/23/1993	WO1993020631A3 A frequency domain scrambling system for audio signals
12/22/1993	CN1023283C Synchronizing method in mobile radio system
12/21/1993	US5272753 Scrambling apparatus
12/21/1993	CA2010944C Controlled authorization of descrambling of scrambled programs broadcast between different jurisdictions
11/1993
11/30/1993	US5267312 Audio signal cryptographic system
11/25/1993	WO1993023938A1 Voice and data encryption device
11/24/1993	CN1078835A Signal encryption method and system based on chaos theory
11/23/1993	CA1324652C Method and apparatus for jamming cable television channels
11/18/1993	EP0570103A2 A remote control security system
11/03/1993	EP0471677B1 An information transmission system
10/1993
10/28/1993	WO1993021703A1 Signal distribution system
10/28/1993	WO1993021581A2 Cryptographic data security in a secured computer system
10/28/1993	CA2118493A1 Fair cryptosystems and methods of use
10/28/1993	CA2118246A1 Data enclave and trusted path system
10/20/1993	CN2144379Y Sound coupled wire and wireless telephone encryption apparatus
10/14/1993	WO1993020631A2 A frequency domain scrambling system for audio signals
10/12/1993	US5253296 Privacy signalling system

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