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)
04/1992
04/08/1992EP0479461A2 Prevention of inspection of secret data stored in encapsulated integrated circuit chip
04/08/1992EP0478571A1 Method and apparatus for remotely controlling and monitoring the use of computer software.
04/08/1992EP0460092A4 Improved encryption printed circuit board
04/07/1992US5103479 Encipher method and decipher method
04/07/1992US5103478 Secure management of keys using control vectors with multi-path checking
04/02/1992WO1992005647A1 Sequence synchronisation
04/01/1992CN1059999A Encryption system for digital cellular communications
03/1992
03/31/1992US5101430 Method and device for generating and for validating a digital message and application of such a device
03/25/1992EP0476741A2 Miscorrection arrangement for the concealment of misdetected or miscorrected digital signals
03/18/1992EP0475837A1 Method of managing an application program stored in an IC card
03/17/1992CA1297584C Security device for sensitive data
03/11/1992EP0474624A2 Method for enciphering binary information and apparatus for implementing said method
03/11/1992EP0165294B1 Portable telephone id code transfer system
03/05/1992WO1991018459A3 Device for converting a digital block and the use thereof
03/04/1992EP0472939A1 Cryptographic key version control facility
03/04/1992EP0472714A1 Process for authenticating a user using a data station
03/03/1992US5093860 Key management system
03/03/1992CA1296809C2 Automated transaction system with modular printhead having print authentication feature
03/03/1992CA1296771C Communication system with tandem scrambling devices
02/1992
02/28/1992CA2024049A1 Cryptographic method and apparatus for public key exchange with authentication
02/26/1992EP0471939A2 Secure cryptographic operations using alternate modes of control vector enforcement
02/26/1992CN1059058A Authentication system for digital cellular communications
02/25/1992US5091942 Authentication system for digital cellular communications
02/25/1992US5091941 Secure voice data transmission system
02/19/1992EP0471373A2 Information processing apparatus with replaceable security element
02/18/1992CA1296104C Metering retrieval of encrypted data stored in customer data retrieval terminal
02/13/1992DE4024132A1 Radio data system receiver - has data processor with fault checking device incorporating data block memory
02/11/1992CA1295706C Method and system for authentication of accreditations and of messages with zero-knowledge proof and for the signing of messages, and a station for use in such system, in particular executed as a smart card station
02/06/1992WO1992002086A1 Cryptographic device with a display for indentification of a defective function in the device
02/05/1992CN1058499A Resynchronization of encryption systems upon handoff
02/04/1992US5086468 Text modifier
02/04/1992CA1295412C Bootstrap channel security arrangement for communication network
02/03/1992WO1992003000A1 Method for secure time-stamping of digital documents
01/1992
01/29/1992EP0468248A2 Method and apparatus for key synchronisation in secure data networks in half-duplex mode
01/28/1992CA1295052C Cipher system
01/24/1992WO1992002087A1 Authentication system for digital cellular communications
01/23/1992WO1991017614A3 Distributed information system having automatic invocation of key management negotiations protocol and method
01/22/1992EP0467239A2 An encryption system based on Chaos theory
01/22/1992EP0466916A1 External security module for a television signal decoder
01/21/1992WO1992002089A1 Encryption system for digital cellular communications
01/21/1992WO1992002088A1 Resynchronization of encryption systems upon handoff
01/17/1992WO1992002103A1 Method for authentication and protection of subscribers in telecommunication systems
01/14/1992US5081679 Resynchronization of encryption systems upon handoff
01/14/1992US5081678 Method for utilizing an encrypted key as a key identifier in a data packet in a computer network
01/14/1992US5081677 Crypotographic key version control facility
01/08/1992EP0464565A2 Cryptography processor and method with optional status encoding
01/07/1992US5079733 Pseudo-random sequence generator arrangement
01/02/1992EP0463384A1 Method of access to a cordless telephone service
01/02/1992DE3448393C2 Identification code monitoring circuit
12/1991
12/31/1991US5077794 Dual framing bit sequence alignment apparatus and method
12/31/1991US5077793 Residue number encryption and decryption system
12/31/1991CA1293785C Secure communication system
12/30/1991CA2044860A1 Cryptography processor and method with optional status endcoding
12/21/1991CA2045001A1 Data locking system
12/18/1991EP0461983A1 Secrets transfer method, by exchange of two certifiers between two microcomputers, authenticating one another
12/17/1991US5073935 Method for secure communication
12/17/1991US5073934 Method and apparatus for controlling the use of a public key, based on the level of import integrity for the key
12/11/1991EP0461029A1 Trans-controller method and device for installation and distribution of television programmes with conditional access
12/11/1991EP0460538A2 Cryptographic communication method and cryptographic communication device
12/11/1991EP0460092A1 Improved encryption printed circuit board
12/03/1991CA1292790C Controlled use of cryptographic keys via generating station establishedcontrol values
12/01/1991CA2043290A1 Wireless telephone service access method
11/1991
11/28/1991WO1991018460A1 Process for the blockwise coding of digital data
11/28/1991WO1991018459A2 Device for converting a digital block and the use thereof
11/28/1991WO1991003896A3 Computer communications system
11/27/1991EP0458210A2 Method and apparatus for cryptographic transcoding of messages
11/26/1991US5068895 Encryption and decryption methods using bit-length preservation decryptor
11/26/1991US5068894 Method of generating a unique number for a smart card and its use for the cooperation of the card with a host system
11/26/1991CA1292540C Method for connection of secure conference calls
11/21/1991EP0457709A1 Cipher machine
11/21/1991EP0457602A2 Data security in multi-carrier communication systems
11/21/1991DE4016203A1 Verfahren zur blockweisen chiffrierung von digitalen daten Method for block enciphering of digital data
11/19/1991US5067156 Method for generating a random number for the encoded transmission of data upon employment of a variable starting value
11/13/1991EP0456553A1 Method for obtaining a secure authentification in clear text in a distributed information system environment
11/13/1991EP0456115A2 Arrangement for avoiding loss of key phase in data transmission networks operating in half-duplex
11/12/1991WO1991018169A1 Electronic security system
11/05/1991US5063596 Encryption printed circuit board
11/05/1991CA1291801C Enciphering/deciphering method and arrangement for performing the method
10/1991
10/31/1991WO1991016778A1 System to prevent a scrambler from generating undesired symbols
10/30/1991EP0454505A2 Multipath transmission system
10/30/1991EP0454187A2 Data randomization equipment
10/28/1991WO1991017614A2 Distributed information system having automatic invocation of key management negotiations protocol and method
10/28/1991CA2041309A1 Multipath transmission system
10/23/1991EP0452717A2 Addressable control system for CATV program distribution
10/22/1991US5060266 Continuous cipher synchronization for cellular communication system
10/22/1991US5060265 Method of protecting a linear feedback shift register (LFSR) output signal
10/22/1991US5060263 Computer access control system and method
10/17/1991WO1991015816A1 Method and apparatus for protection of software in an electronic system
10/16/1991EP0451476A2 Secure key management using programmable control vector checking
10/15/1991US5058163 Interface unit for transferring digital data between time-domain multiplexed communication links
10/15/1991US5058157 Method and apparatus for encrypting and decrypting time domain signals
10/11/1991WO1991015910A1 Method of synchronising the pseudo-random binary sequence in a descrambler
10/09/1991EP0450841A2 Video control system
10/08/1991US5056140 Communication security accessing system and process
10/08/1991US5056137 Method and apparatus for encoding and decoding signals
10/03/1991WO1991014980A1 Process for authenticating a user using a data station
10/02/1991EP0449716A1 System for condensing digital data
10/02/1991EP0449349A1 Method for the modular reduction of numbers
10/02/1991EP0449265A2 Random number generator
10/01/1991US5054068 Trunked radio communication system having encrypted system control information
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