| Patents for H04K 1 - Secret communication (16,771) |
|---|
| 09/17/1997 | CN1159873A Method of and apparatus for scrambling a video signal with full network transmission and recording capability |
| 09/17/1997 | CN1159711A Method and equipment for video signal ciphering and deciphering |
| 09/17/1997 | CN1159710A Method and equipment for video signal ciphering and deciphering |
| 09/17/1997 | CN1159709A Method and equipment for video signal ciphering and deciphering |
| 09/17/1997 | CN1159708A Method and equipment for video signal ciphering and deciphering |
| 09/17/1997 | CN1159707A Method and equipment for video signal ciphering and deciphering |
| 09/17/1997 | CN1159706A Method and apparatus for scrambling and descrambling of video signals |
| 09/16/1997 | US5668923 Voice messaging system and method making efficient use of orthogonal modulation components |
| 09/16/1997 | US5668879 Audio scrambling system for scrambling and descrambling audio signals |
| 09/16/1997 | CA2089370C Variable speaker muting based on received data |
| 09/04/1997 | WO1997032414A1 Method of transmitting and receiving data |
| 09/03/1997 | EP0695485A4 Fair cryptosystems and methods of use |
| 08/20/1997 | EP0637413A4 Verifying secret keys in a public-key cryptosystem. |
| 08/13/1997 | EP0788688A1 Method and apparatus for secure identification of a mobile user in a communication network |
| 08/13/1997 | CN1035652C Method and apparatus for scrambling and descrampling of video signals |
| 07/23/1997 | CN1155195A Method for providing access information by enciphering/deciphering information and receiver equipment thereof |
| 07/19/1997 | CA2167543A1 Process for conducting secure electronic transactions over electronic media |
| 07/09/1997 | EP0783215A1 Optical transmission system using encryption based on deterministic chaos |
| 07/02/1997 | CN1153434A Bank remittance information interchange method and apparatus |
| 06/25/1997 | EP0780039A1 Roving software license for a hardware agent |
| 06/04/1997 | EP0776557A1 Multi-band, multi-mode spread-spectrum communication system |
| 06/04/1997 | EP0636259B1 Cryptographic data security in a secured computer system |
| 05/28/1997 | EP0775419A1 Method of and apparatus for scrambling a video signal with full network transmission and recording capability |
| 05/28/1997 | EP0775398A2 Digital radio with vocoding encrypting codec |
| 05/28/1997 | EP0672273A4 Method and apparatus for encryption having a feedback register with selectable taps. |
| 05/09/1997 | WO1997016924A1 Time-shifted conditional access |
| 05/02/1997 | EP0770953A2 Personal date/time notary device |
| 04/24/1997 | WO1997015132A1 Scrambled information transmitting and receiving |
| 04/17/1997 | WO1997014229A1 Process and device for the scalable coding of audio signals |
| 04/16/1997 | CN1147735A Communication method and communication device |
| 04/09/1997 | EP0382764B1 Signal processing apparatus and methods |
| 04/01/1997 | US5617476 Audio scrambling system for scrambling and descrambling audio signals |
| 03/18/1997 | US5613005 Cipher communication method and device |
| 03/13/1997 | WO1997009797A1 Method and apparatus for transporting auxiliary data in audio signals |
| 03/13/1997 | DE19537338C1 Audio signal coding method |
| 03/13/1997 | CA2231239A1 Method and apparatus for transporting auxiliary data in audio signals |
| 03/12/1997 | EP0762764A2 Video scrambling |
| 03/04/1997 | US5608799 Method and apparatus for scrambling and descrambling of video signal with edge fill |
| 03/04/1997 | US5608723 Methods and systems for secure wireless communication within a predetermined boundary |
| 02/19/1997 | CN1143287A Frequency inverted scrambler containing integrated high-pass filter |
| 02/18/1997 | US5604806 Apparatus and method for secure radio communication |
| 02/18/1997 | US5604488 Remote control security system |
| 01/29/1997 | CN1141560A De-secrecy device |
| 01/29/1997 | CN1141559A Secrecy broadcasting system |
| 01/28/1997 | US5598471 Method and apparatus for encoding and decoding of audio transmission signals |
| 01/16/1997 | WO1996023376A3 Apparatus and method for generating pseudorandom quantities based upon radio channel characteristics |
| 01/15/1997 | EP0469106B1 Video signal scrambling and unscrambling device |
| 01/15/1997 | EP0403570B1 Off-premises cable television channel interdiction method and apparatus |
| 01/14/1997 | US5594798 Secure telecommunications |
| 01/14/1997 | US5594794 For providing video services to consumers via an information network |
| 01/08/1997 | EP0752772A2 Cryptographic system for wireless communications |
| 01/08/1997 | EP0752767A2 Signal processing apparatus and methods |
| 01/07/1997 | US5592556 Digital radio with vocoding encrypting codec |
| 01/07/1997 | US5592555 Wireless communications privacy method and system |
| 12/31/1996 | US5590200 Apparatus and method for securing communication systems |
| 12/31/1996 | US5590195 Information dissemination using various transmission modes |
| 12/31/1996 | US5590194 Method of and apparatus for scrambling a video signal with full network transmission and recording capability |
| 12/10/1996 | CA2072260C Method of synchronising the pseudo-random binary sequence in a descrambler |
| 12/05/1996 | WO1996038946A1 Method of encoding sequences consisting of figure-coded data units |
| 12/03/1996 | US5581307 Method and apparatus for scrambling and descrambling of video signals with edge fill |
| 11/27/1996 | EP0744105A1 Method and apparatus for low cost audio scrambling and descrambling |
| 11/26/1996 | US5579394 Clear channel interface module and method therefor |
| 11/26/1996 | US5579392 Duplicating and ciphering device and methods for codification of facsimile telecopies |
| 11/26/1996 | US5579391 TV scramble system for preventing illegal reception |
| 11/26/1996 | US5579390 Method and apparatus for vertically scrambling and descrambling of video signals |
| 11/06/1996 | CN1135150A Wacs-type mobile communication with unified frame format |
| 10/31/1996 | WO1996034470A1 Methods and systems for securing communication within a boundary |
| 10/23/1996 | CN1134083A Decoder |
| 10/22/1996 | US5568556 System and method for encrypting sensitive information |
| 10/22/1996 | US5568553 Cordless phone system capable of scrambling communication signals |
| 10/22/1996 | US5568552 Method for providing a roving software license from one node to another node |
| 10/16/1996 | EP0737907A2 Cryptographic data security in a secured computer system |
| 10/09/1996 | EP0713621A4 Method and apparatus for uniquely encrypting a plurality of services at a transmission site |
| 10/02/1996 | EP0734624A1 A non-deterministic public key encryption system |
| 09/18/1996 | EP0732850A1 Functionally modifiable cable television converter system |
| 09/18/1996 | EP0732017A1 System and method for transmitting and receiving variable length authorization control for digital services |
| 09/17/1996 | US5557090 Card having a ferromagnetic track and reader therefor |
| 09/11/1996 | EP0550540B1 Variable speaker muting based on received data |
| 09/06/1996 | WO1996027248A1 Voice messaging system and method making efficient use of orthogonal modulation components |
| 09/04/1996 | EP0729678A1 Process and device for speech scrambling and unscrambling in speech transmission |
| 09/04/1996 | CN1032726C Signal encryption method and system based on chaos theory |
| 09/03/1996 | US5552897 Secure communication apparatus and method |
| 08/28/1996 | EP0524235B1 Method of synchronising the pseudo-random binary sequence in a descrambler |
| 08/28/1996 | CN1129885A BP machine program with information encryption |
| 08/20/1996 | US5548582 Multicarrier frequency hopping communications system |
| 08/14/1996 | DE19520232C1 Sequence coding for ASCII text encryption |
| 08/13/1996 | US5546423 Spread spectrum digital transmission system using low-frequency pseudorandom encoding of the wanted information and spectrum spreading and compression method used in a system of this kind |
| 08/07/1996 | EP0725544A1 System for displacing a television signal scrambler |
| 08/07/1996 | CN1128595A Method and apparatus for uniquely encrypting a plurality of services at a transmission site |
| 08/01/1996 | WO1996023376A2 Apparatus and method for generating pseudorandom quantities based upon radio channel characteristics |
| 08/01/1996 | CA2210714A1 Apparatus and method for generating pseudorandom quantities based upon radio channel characteristics |
| 07/30/1996 | US5541997 Method and apparatus for detecting correctly decrypted communications |
| 07/25/1996 | WO1996022643A1 Establishment of cryptographic keys in radio networks |
| 07/25/1996 | CA2210195A1 Establishment of cryptographic keys in radio networks |
| 07/24/1996 | EP0723373A2 Decryptor |
| 07/24/1996 | EP0723371A1 Method and apparatus for protecting control signals in a conditional access system |
| 07/24/1996 | EP0722639A1 Automatic real-time highway toll collection from moving vehicles |
| 07/09/1996 | US5535275 Apparatus and method for producing scrambled digital video signals |
| 07/09/1996 | CA2074610C Wireless telephone with frequency inversion scrambling |
| 06/25/1996 | US5530737 Secure access telephone extension system and method |