Patents
Sitemap › H04 - Electric communication technique › H04L - Transmission of digital information, e.g. telegraphic communication › H04L 9 - Arrangements for secret or secure communication
Patents for H04L 9 - Arrangements for secret or secure communication (111,914)
04/1990
04/05/1990DE3832946A1 Method for encoding digital time-division multiplex signals
04/03/1990US4914698 One-show blind signature systems
04/03/1990US4914697 Cryptographic method and apparatus with electronically redefinable algorithm
04/03/1990US4914696 Communications system with tandem scrambling devices
03/1990
03/28/1990EP0360478A2 A packet switching architecture providing encryption across packets
03/28/1990CN1040893A Cordless telephone
03/27/1990US4912762 Management of cryptographic keys
03/21/1990EP0359729A2 Encryption with subsequent source coding
03/20/1990US4910777 Packet switching architecture providing encryption across packets
03/20/1990US4910776 Encryption printed circuit board
03/20/1990US4910773 Method of dispatching secret keys to security modules and user cards in a data processing network
03/14/1990CN1040476A In-band controller
03/14/1990CN1040472A Communications system with tandem scrambling devices
03/13/1990US4908861 Data authentication using modification detection codes based on a public one way encryption function
03/08/1990WO1990002456A1 Public key diversification method
03/06/1990US4907275 Encryption apparatus
03/06/1990US4907272 Method for authenticating an external authorizing datum by a portable object, such as a memory card
03/06/1990US4907270 Method for certifying the authenticity of a datum exchanged between two devices connected locally or remotely by a transmission line
03/06/1990CA1266520A1 Restoring framing in a communications system
02/1990
02/28/1990EP0356127A2 A RSA computation method for efficient batch processing
02/28/1990EP0356065A2 Secure management of keys using control vectors
02/14/1990EP0354774A2 Data cryptography using control vectors
02/14/1990EP0354771A2 Personal identification number processing using control vectors
02/14/1990EP0354770A2 Secure management of keys using extended control vectors
02/13/1990US4901348 Data transmission security arrangement for a plurality of data stations sharing access to a communication network
02/13/1990US4901264 Pseudo random pattern generating device
02/07/1990EP0353352A1 Method & apparatus for continuously acknowledged link encrypting
01/1990
01/30/1990US4897876 Method of and an arrangement for digital signal encryption
01/30/1990US4897875 Key management system for open communication environments
01/30/1990CA1265244A1 Security device for stored sensitive data
01/25/1990WO1990000843A1 Cordless telephone
01/23/1990CA1264855A1 Offline pin validation with des
01/10/1990EP0350278A2 Digital signal processing
01/10/1990EP0350119A1 Stand-alone utility device with antitheft code
01/09/1990US4893339 Secure communication system
01/09/1990CA1264355A1 Gateway system and method for interconnecting telephone calls with a digital voice protected radio network
01/03/1990EP0348812A2 Authentication method and apparatus therefor
12/1989
12/28/1989WO1989012863A1 System and method for the secure handling of encryptor keys
12/26/1989US4890324 Enciphering/deciphering method and arrangement for performing the method
12/26/1989US4890323 Data communication systems and methods
12/26/1989US4890252 Long period pseudo random number sequence generator
12/19/1989US4888802 System and method for providing for secure encryptor key management
12/19/1989US4888801 Hierarchical key management system
12/19/1989US4888800 Secure messaging systems
12/13/1989EP0346180A1 Apparatus for protected data communication
12/13/1989EP0345845A2 Enciphering and deciphering device for high bit-rate transmission systems
12/13/1989CN1038003A Method and apparatus for encoding and decoding information signal
12/12/1989US4887296 Cryptographic system for direct broadcast satellite system
12/05/1989US4885789 Remote trusted path mechanism for telnet
12/05/1989US4885777 Electronic transaction system
11/1989
11/30/1989WO1989011762A1 Card-computer moderated systems
11/30/1989WO1989011706A1 Method and device for authentication
11/30/1989DE3915262A1 Method for generating authenticated secret codes
11/29/1989EP0344071A1 Method of broadcasting and receiving messages for admission entitlement supervision
11/29/1989EP0343805A2 Reproduction of secure keys by using distributed key generation data
11/28/1989CA1263463A1 Communications scrambler system
11/23/1989EP0342832A2 Dynamic feedback arrangement scrambling technique keystream generator
11/15/1989EP0341710A2 Atomic sequence for phase transitions
11/15/1989EP0341627A1 Filling head
11/14/1989US4881264 Digital signature system and method based on a conventional encryption function
11/14/1989US4881263 Apparatus and method for secure transmission of data over an unsecure transmission channel
11/08/1989EP0340633A2 Encoding and decoding method and apparatus
11/07/1989US4879747 Method and system for personal identification
11/02/1989WO1989010666A1 Security system network
11/02/1989WO1989010664A1 In-band controller
11/02/1989WO1989010661A1 Spectrally efficient method for communicating an information signal
10/1989
10/31/1989US4878246 Method and apparatus for generating encryption/decryption key
10/31/1989CA1262575A1 System for preventing software piracy employing multi- encrypted keys and single decryption circuit modules
10/24/1989US4876718 Secure data packet transmission system and method
10/24/1989US4876716 Key distribution method
10/11/1989EP0336079A2 Method and apparatus for controlling access to a communication system
10/04/1989EP0335555A2 User to network interface protocol for packet communications networks
09/1989
09/27/1989EP0334616A2 Method and system for personal identification
09/27/1989EP0334503A2 Data-processing apparatus and method
09/26/1989US4870682 Television scrambling system
09/26/1989US4870681 Cryptographic method and cryptographic processor for carrying out the method
09/26/1989CA1261971A1 System for using a personal computer
09/26/1989CA1261087A1 Device for establishing a connection between a telecommunication network and a controllable system, such as a computer system, provided with an access control unit controllablevia a separate network terminal
09/21/1989WO1989008957A1 One-show blind signature systems
09/21/1989WO1989008915A1 Digital data security system
09/19/1989US4868877 Public key/signature cryptosystem with enhanced digital signature certification
09/12/1989US4866773 System for interfacing a digital encryption device to a time-division multiplexed communication system
09/12/1989US4866772 Communication system
09/12/1989US4866707 Secure messaging systems
09/07/1989DE3904831A1 A universal homophonic coding method
09/05/1989US4864615 Reproduction of secure keys by using distributed key generation data
09/05/1989US4864525 Maximum length shift register sequence generator
08/1989
08/29/1989US4862501 Communications network using IC cards
08/22/1989US4860353 Dynamic feedback arrangement scrambling technique keystream generator
08/22/1989US4860352 Satellite communication system and method with message authentication suitable for use in financial institutions
08/16/1989EP0328232A2 Public key/signature cryptosystem with enhanced digital signature certification
08/10/1989WO1989007375A1 Cryptographic method and apparatus with electronically redefinable algorithm
08/09/1989EP0326700A2 A trusted path mechanism for virtual terminal environments
08/09/1989EP0326699A2 A remote trusted path mechanism for telnet
08/08/1989US4856063 No-overhead synchronization for cryptographic systems
08/08/1989CA1258305A1 Encryption/decryption system
08/01/1989US4853962 Encryption system
08/01/1989US4853961 Reliable document authentication system
07/1989
07/26/1989EP0325238A2 Improved variants of the Fiat-Shamir identification and signature scheme
07/25/1989US4852023 Nonlinear random sequence generators
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