| Patents for H04L 9 - Arrangements for secret or secure communication (111,914) |
|---|
| 10/01/1991 | US5054067 Block-cipher cryptographic device based upon a pseudorandom nonlinear sequence generator |
| 10/01/1991 | US5054066 Error correcting public key cryptographic method and program |
| 10/01/1991 | US5053992 Prevention of inspection of secret data stored in encapsulated integrated circuit chip |
| 09/26/1991 | DE4008971A1 Verfahren zur authentifizierung eines eine datenstation benutzenden anwenders A method for authentication of a data-station-use product user |
| 09/25/1991 | EP0448534A2 Method and apparatus for encryption/decryption of digital multisound in television |
| 09/25/1991 | CN1054873A Simulative interference video signals generator |
| 09/25/1991 | CN1054868A Method of carrying out authentication check between base station and mobile station in mobile radio system |
| 09/24/1991 | CA2038916A1 Method and apparatus for encryption/decryption of digital multisound in television |
| 09/24/1991 | CA1289640C Nonlinear random sequence generators |
| 09/19/1991 | WO1991014348A1 A method of carrying out an authentication check between a base station and a mobile station in a mobile radio system |
| 09/18/1991 | EP0447380A1 A method of carrying out an authentication check between a base station and a mobile station in a mobile radio system |
| 09/18/1991 | EP0447063A2 Security enhancement in a data processor through use of dynamic parameter authentication |
| 09/18/1991 | EP0294397A4 Automated transaction system using microprocessor cards |
| 09/18/1991 | CN1054693A Continous cipher synchronization for cellular communication system |
| 09/17/1991 | CA1289240C Method to authentify external validation data by means of a portable device such as a memory card |
| 09/17/1991 | CA1289239C Method for certifying the authenticity of data exchanged between two devicesconnected by a transmission line |
| 09/11/1991 | EP0446194A1 Continous cipher synchronization for cellular communication system |
| 09/11/1991 | EP0445290A1 Adaptive data ciphering/deciphering apparatus and data communication system employing said apparatus |
| 09/11/1991 | EP0377687A4 Spectrally efficient method for communicating an information signal |
| 09/10/1991 | WO1991014322A1 Encryption apparatus |
| 09/10/1991 | US5048087 Key management for encrypted packet based networks |
| 09/10/1991 | US5048086 Encryption system based on chaos theory |
| 09/10/1991 | US5048085 Transaction system security method and apparatus |
| 09/10/1991 | US5048052 Spread spectrum communication device |
| 09/08/1991 | WO1991014315A1 Continuous cipher synchronization for cellular communication system |
| 09/03/1991 | US5046125 Lock control method for on-board terminal equipment of a mobile telecommunications system |
| 09/03/1991 | US5046094 Server-aided computation method and distributed information processing unit |
| 08/28/1991 | EP0443752A2 Block-cipher cryptographic device based upon a pseudorandom nonlinear sequence generator |
| 08/28/1991 | EP0443679A1 Coding method, according to the RSA method, by a microcontroller and a device using this method |
| 08/27/1991 | US5043988 Method and apparatus for high precision weighted random pattern generation |
| 08/22/1991 | WO1991012680A1 Apparatus and method for data communication |
| 08/14/1991 | EP0440914A2 Method for allocating information data to a certain sender |
| 08/08/1991 | WO1991011884A1 External security module for a television signal decoder |
| 08/08/1991 | WO1991011794A1 Equipment for protecting data in a data-processing system |
| 08/07/1991 | EP0439847A1 Optionally moderated transaction systems |
| 08/07/1991 | EP0439512A1 Returned-value blind signature systems. |
| 08/06/1991 | US5038376 Block substitution based encryption by a modulo 2 addition method and apparatus |
| 07/24/1991 | EP0438154A2 Multimedia network system |
| 07/17/1991 | EP0436799A2 Communication network with key distribution |
| 07/16/1991 | US5033084 Method and apparatus for protection of software in an electronic system |
| 07/16/1991 | CA1286417C Method and apparatus for forming identification data |
| 07/10/1991 | EP0436432A1 Method for the detection, the recognition and the use of signals mixed with other coding or parasitic signals and device for carrying out this method |
| 07/10/1991 | EP0265477B1 Data conversion |
| 07/09/1991 | US5031214 Document authentication apparatus |
| 07/09/1991 | US5031129 Parallel pseudo-random generator for emulating a serial pseudo-random generator and method for carrying out same |
| 07/03/1991 | EP0435032A2 Conference system |
| 07/02/1991 | US5029210 Cooperative communication system |
| 07/02/1991 | US5029208 Cipher-key distribution system |
| 07/02/1991 | US5029207 External security module for a television signal decoder |
| 06/28/1991 | CA2033262A1 Method and device for detecting, identifying and using signals mixed with coding or interference signals |
| 06/26/1991 | EP0434551A1 Method of generating a pseudo-random number in a dataprocessing-system, and a system for carrying out the method |
| 06/26/1991 | EP0434550A1 Method of generating a pseudo-random number in a portable electronic objects system and a system for carrying out the method |
| 06/25/1991 | US5027397 Data protection by detection of intrusion into electronic assemblies |
| 06/25/1991 | US5027395 Data-locking system |
| 06/20/1991 | WO1991009382A1 Method for generating a random number in a system comprising portable electronic objects, and system for implementing said method |
| 06/20/1991 | WO1991009381A1 Method for generating a random number in a data processing system, and system for implementing said method |
| 06/11/1991 | US5023936 Method and apparatus for externally defining the operational mode of a digital radio transceiver |
| 06/08/1991 | CA2005032A1 Address code modification in a transmitter receiver pair |
| 06/06/1991 | DE3939828A1 Data transmission with unauthorised access prevention - encoding all data after preamble and transmitting via bus system |
| 06/05/1991 | EP0429824A2 Secure key management using control vector translation |
| 06/04/1991 | US5022080 Electronic notary |
| 05/28/1991 | US5020129 Addressable control system for CATV program distribution |
| 05/28/1991 | US5020106 Process for the cryptographic processing of data and cryptographic systems |
| 05/28/1991 | US5020105 Field initialized authentication system for protective security of electronic information networks |
| 05/22/1991 | CN1051650A Method and apparatus for encrypting and decrypting time domain signals |
| 05/21/1991 | US5018196 Method for electronic transaction with digital signature |
| 05/15/1991 | EP0427601A1 Method for authenticating a microprocessor-card, and system for implementing it |
| 05/15/1991 | EP0427465A2 Databaseless security system |
| 05/14/1991 | US5016276 Common cryptokey generation system and communication system using common cryptokeys |
| 05/14/1991 | US5016275 Buffered encryption/decryption |
| 05/14/1991 | US5016274 On-line/off-line digital signing |
| 05/14/1991 | CA1284223C System and method for diversifying a basic key and authenticating saidkey |
| 05/07/1991 | WO1991007033A1 Method and system for personal identification using proofs of legitimacy |
| 05/07/1991 | US5014313 Text modifier |
| 04/23/1991 | US5010573 Cryptographic system by blocs of binery data |
| 04/23/1991 | US5010572 Distributed information system having automatic invocation of key management negotiations protocol and method |
| 04/23/1991 | US5010571 Metering retrieval of encrypted data stored in customer data retrieval terminal |
| 04/18/1991 | WO1991005421A1 Method and apparatus for encoding and decoding signals |
| 04/17/1991 | EP0422757A2 Public/key date-time notary facility |
| 04/17/1991 | EP0422230A1 Data carrier and data communication apparatus using the same |
| 04/17/1991 | CN1012410B Communications system with tandem scrambling devices |
| 04/16/1991 | US5008938 Encryption apparatus |
| 04/16/1991 | US5008935 Efficient method for encrypting superblocks of data |
| 04/16/1991 | CA1283187C Key management system for open communication environment |
| 04/11/1991 | DE4006251C1 Recognising periodicity in pseudo-stochastic sequence of bits - using comparison registers charged with different cycle and generating alarm if last bits of series correspond |
| 04/10/1991 | EP0421754A2 Block substitution based encryption by a modulo 2 addition method and apparatus |
| 04/10/1991 | EP0421409A2 Transaction system security method and apparatus |
| 04/09/1991 | US5007089 Secure key management using programable control vector checking |
| 04/09/1991 | US5007087 Method and apparatus for generating secure random numbers using chaos |
| 04/09/1991 | US5007083 Secure computer |
| 04/06/1991 | WO1991005302A1 A method of controlling access to restricted access data and communication system therefor |
| 04/04/1991 | WO1991003014A3 Method and apparatus for high precision weighted random pattern generation |
| 04/02/1991 | US5005200 Public key/signature cryptosystem with enhanced digital signature certification |
| 03/27/1991 | EP0419306A1 Method and apparatus for generating and validating a numerical message and application of such an apparatus |
| 03/27/1991 | EP0418742A1 Method and device for secure data transmission |
| 03/27/1991 | EP0418328A1 Card-computer moderated systems. |
| 03/27/1991 | CN1050294A Synchronizing method in mobile radio system |
| 03/26/1991 | US5003598 Secure communication system |
| 03/26/1991 | US5003597 Method and apparatus for data encryption |
| 03/26/1991 | US5003596 Method of cryptographically transforming electronic digital data from one form to another |