| Patents for G09C 1 - Apparatus or methods whereby a given sequence of signs, e.g. an intelligible text, is transformed into an unintelligible sequence of signs by transposing the signs or groups of signs or by replacing them by others according to a predetermined system (12,544) |
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| 05/05/1993 | EP0539726A2 Method to establish and enforce a network cryptographic security policy in a public key cryptosystem |
| 05/04/1993 | US5208853 Method and apparatus for usage protection of data files using split key and unique variable |
| 05/01/1993 | CA2071771A1 Cryptographic facility environment backup/restore and replication in a public key cryptosystem |
| 04/28/1993 | EP0538946A1 Method for authenticating communication participants, and system for application of the method |
| 04/28/1993 | EP0538888A1 Information processing method and system |
| 04/21/1993 | EP0538216A1 Means for identification and exchange of encryption keys |
| 04/21/1993 | EP0537903A2 Distributed control system |
| 04/20/1993 | US5204902 Cellular telephony authentication arrangement |
| 04/13/1993 | US5202922 Data communication system |
| 04/13/1993 | US5202920 Facsimile equipment having a secure communication function |
| 04/07/1993 | EP0535863A2 A cryptographic protocol for secure communications |
| 04/06/1993 | US5201000 Method for generating public and private key pairs without using a passphrase |
| 04/06/1993 | US5200999 In a data processing system |
| 03/31/1993 | EP0534420A2 A method for generating public and private key pairs using a passphrase |
| 03/31/1993 | EP0534419A2 Public key cryptosystem key management based on control vectors |
| 03/31/1993 | CN1020233C Method and apparatus for encrypting and decrypting time domain signals |
| 03/28/1993 | CA2075254A1 Method for generating public and private key pairs without using a passphrase |
| 03/23/1993 | CA1315032C Cordless telephone |
| 03/23/1993 | CA1314954C Personal identification encryptor system with error-correcting code and method |
| 03/17/1993 | EP0532231A2 Service provision authentication protocol |
| 03/17/1993 | EP0532228A2 A cryptosystem for cellular telephony |
| 03/17/1993 | EP0532227A2 Cellular telephony authentication arrangement |
| 03/17/1993 | EP0532226A2 Speech and control message encryption in cellular radio |
| 03/17/1993 | EP0531784A2 Apparatus for encryption and decryption using split key |
| 03/03/1993 | EP0529261A2 A hybrid public key algorithm/data encryption algorithm key distribution method based on control vectors |
| 03/02/1993 | US5191608 Method for the management of an application program loaded in a microcircuit medium |
| 02/24/1993 | EP0528730A1 Method for emitting and receiving personalized programs |
| 02/24/1993 | EP0418328A4 Card-computer moderated systems |
| 02/18/1993 | WO1993003562A1 Digital signature algorithm |
| 02/18/1993 | WO1993003559A1 Nonlinear dynamic substitution devices and methods for block substitutions |
| 02/03/1993 | EP0525968A2 Method and apparatus for cryptographic processing in a communication network, using a single cryptographic engine |
| 02/02/1993 | CA1313411C Personal identification number processing using control vectors |
| 01/20/1993 | EP0374225B1 Method and device for authentication |
| 01/13/1993 | EP0522473A2 Cryptographic identity verification method and apparatus |
| 01/05/1993 | US5177790 Method for generating a random number in a data processing system/and system for implementing the method |
| 01/05/1993 | US5177485 Method of scrambling pal, secam and ntsc composite video signals and decoder of signals scrambled by this method |
| 12/16/1992 | EP0518466A1 Data processing system with cryptographic facility |
| 12/16/1992 | EP0518315A2 System and method for blockwise encryption of data |
| 12/15/1992 | US5172414 Speech and control message encrypton in cellular radio |
| 12/15/1992 | CA1311559C Method and system for personal identification |
| 12/09/1992 | EP0516898A1 Electronic notary |
| 12/09/1992 | CN2124493U Plug-in variable cipher controller |
| 12/01/1992 | US5168523 Method of rotating a word constituted by binary elements and arrangement in which the said method is carried out |
| 12/01/1992 | US5168521 Method of executing an irregular permutation of data protected by encryption |
| 11/24/1992 | US5166980 Tabular guide decrypting apparatus |
| 11/24/1992 | US5166978 Encoding system according to the so-called rsa method, by means of a microcontroller and arrangement implementing this system |
| 11/17/1992 | US5164988 Data processing network |
| 11/04/1992 | CN1065947A Random recombined multidimensional testing method |
| 10/28/1992 | CN1065742A Commercial code type encrypting method |
| 10/27/1992 | US5159634 Cryptosystem for cellular telephony |
| 10/27/1992 | US5159633 Multimedia network system |
| 10/07/1992 | EP0407465A4 One-show blind signature systems |
| 10/06/1992 | US5153919 Service provision authentication protocol |
| 09/23/1992 | EP0505302A1 Authentication protocols in communication networks |
| 09/23/1992 | EP0504996A2 Arithmetic unit for multiplying long integers modulo M and R.S.A. converter provided with such multiplication device |
| 09/23/1992 | CN1018394B Cryptographic electronic program controller and application method thereof |
| 09/15/1992 | US5148479 Authentication protocols in communication networks |
| 09/09/1992 | EP0502559A2 Method, identification device and verification device for identification and/or performing digital signature |
| 09/09/1992 | EP0502441A2 Key distribution system for distributing a cipher key between two subsystems by one-way communication |
| 09/08/1992 | US5146499 Data processing system comprising authentification means viz a viz a smart card, an electronic circuit for use in such system, and a procedure for implementing such authentification |
| 09/01/1992 | US5144665 Cryptographic communication method and system |
| 08/26/1992 | EP0500244A2 Cipher communication method for transaction data |
| 08/25/1992 | US5142578 Hybrid public key algorithm/data encryption algorithm key distribution method based on control vectors |
| 08/18/1992 | CA1306549C Process and apparatus for the protection of secret elements in a network of encrypting devices with open key management |
| 08/08/1992 | WO1992014318A1 Method, identification device and verification device for identification and/or performing digital signature |
| 08/08/1992 | CA2101322A1 Method, identification device and verification device for identification and/or performing digital signature |
| 07/29/1992 | EP0496459A1 Method and apparatus for access control and/or identification |
| 07/19/1992 | WO1992013321A1 Method and apparatus for access control and/or identification |
| 07/19/1992 | CA2100576A1 Method and apparatus for access control and/or identification |
| 06/23/1992 | US5124541 Form and procedure for selecting a code to be kept secret |
| 06/23/1992 | US5124117 Cryptographic key distribution method and system |
| 06/17/1992 | EP0489742A1 Encryption method |
| 06/09/1992 | US5120939 Databaseless security system |
| 05/29/1992 | WO1992009053A1 Pocketable slide card for recording personal codes |
| 05/05/1992 | US5111504 Information processing apparatus with replaceable security element |
| 04/29/1992 | EP0482371A2 Method and apparatus for controlling the use of a public key, based on the level of integrity for the key |
| 04/29/1992 | EP0482154A1 Device for converting a digital block and the use thereof. |
| 04/22/1992 | CN1016391B Cordless telephone |
| 04/07/1992 | US5103479 Encipher method and decipher method |
| 04/01/1992 | CN1059999A Encryption system for digital cellular communications |
| 03/18/1992 | EP0475837A1 Method of managing an application program stored in an IC card |
| 03/05/1992 | WO1991018459A3 Device for converting a digital block and the use thereof |
| 03/04/1992 | EP0472939A1 Cryptographic key version control facility |
| 03/04/1992 | EP0472714A1 Process for authenticating a user using a data station |
| 02/26/1992 | EP0471939A2 Secure cryptographic operations using alternate modes of control vector enforcement |
| 02/19/1992 | EP0471373A2 Information processing apparatus with replaceable security element |
| 02/11/1992 | US5088093 Self-correcting registers, error-detecting/correcting registers, and inversion coding using one bit, and other information storage media |
| 02/11/1992 | CA1295706C 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 |
| 02/03/1992 | WO1992003000A1 Method for secure time-stamping of digital documents |
| 01/28/1992 | CA1295052C Cipher system |
| 01/23/1992 | WO1991017614A3 Distributed information system having automatic invocation of key management negotiations protocol and method |
| 01/22/1992 | EP0467239A2 An encryption system based on Chaos theory |
| 01/21/1992 | WO1992002089A1 Encryption system for digital cellular communications |
| 01/14/1992 | US5081678 Method for utilizing an encrypted key as a key identifier in a data packet in a computer network |
| 01/14/1992 | US5081677 Crypotographic key version control facility |
| 12/31/1991 | US5077796 Cryptograph |
| 12/18/1991 | EP0461983A1 Secrets transfer method, by exchange of two certifiers between two microcomputers, authenticating one another |
| 12/17/1991 | US5073934 Method and apparatus for controlling the use of a public key, based on the level of import integrity for the key |
| 12/11/1991 | EP0461029A1 Trans-controller method and device for installation and distribution of television programmes with conditional access |
| 12/03/1991 | CA1292790C Controlled use of cryptographic keys via generating station establishedcontrol values |