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)
05/1997
05/27/1997US5633932 Apparatus and method for preventing disclosure through user-authentication at a printing node
05/27/1997US5633931 Method and apparatus for calculating message signatures in advance
05/27/1997US5633929 Cryptographic key escrow system having reduced vulnerability to harvesting attacks
05/27/1997US5633928 Key escrow method with warrant bounds
05/22/1997WO1997018655A1 Root key compromise recovery
05/22/1997WO1997018654A1 Apparatus and method for encrypting mpeg packets
05/22/1997WO1997018653A1 Wireless transaction and information system
05/22/1997WO1997018652A1 Efficient cryptographic hash functions and methods for amplifying the security of hash functions and pseudo-random functions
05/22/1997CA2236931A1 Wireless transaction and information system
05/21/1997EP0774845A2 Method and apparatus for authenticating users of a subscriber line
05/20/1997US5631962 Circuit and method of encrypting key validation
05/20/1997US5631961 Device for and method of cryptography that allows third party access
05/20/1997US5631960 Autotest of encryption algorithms in embedded secure encryption devices
05/15/1997WO1997017781A1 Encryption key management
05/15/1997WO1997017646A1 Method for secure data transfer on a multi-server network
05/14/1997EP0773647A2 Method and apparatus for cryptographic communications using blind signatures
05/14/1997EP0772930A1 Method and apparatus for the verification of data sequences
05/14/1997EP0772722A1 Electronic combination lock security system
05/14/1997CN1149797A Relicable control and access method and system for system resource in distribating system
05/13/1997US5629982 Method of transmitting a message
05/13/1997US5629980 System for controlling the distribution and use of digital works
05/09/1997WO1997016924A1 Time-shifted conditional access
05/09/1997WO1997016911A1 Secured gateway interface
05/09/1997WO1997016905A1 Tree-based certificate revocation system
05/09/1997WO1997016904A1 Method and device for data communication
05/09/1997WO1997016903A1 Cryptographic methods for demonstrating satisfiable formulas from propositional logic
05/09/1997WO1997016902A2 Unified end-to-end security methods and systems for operating on insecure networks
05/09/1997WO1997016897A1 Computerized payment system for purchasing goods and services on the internet
05/09/1997WO1997016779A2 Input security and transactions unit and process for input security and transactions involving digital information
05/09/1997CA2236406A1 Unified end-to-end security methods and systems for operating on insecure networks
05/09/1997CA2236118A1 Computerized payment system for purchasing goods and services on the internet
05/07/1997EP0771499A2 Method for securely using digital signatures in a commercial cryptographic system
05/07/1997EP0771498A1 Rolling code security system
05/07/1997EP0771452A1 Authentication technique
05/07/1997DE19635108A1 B-bit expansion sub-block calculation device with fragmentation on hardware basis
05/07/1997DE19540973A1 Digital information input security and transaction method
05/07/1997CN1149219A Licensee notification system
05/06/1997US5627894 Random number generator
05/06/1997US5627893 Cryptographic method
05/03/1997CA2161983A1 Confidential information transmission bypassing the internet
05/02/1997EP0771094A2 Method and apparatus for generating and recognizing authenticity of command signals
05/02/1997EP0770953A2 Personal date/time notary device
05/01/1997WO1997016003A1 Security chip
05/01/1997WO1997015348A1 Bio-active frequency generator and method
05/01/1997WO1997009817A3 Document processing
05/01/1997WO1997008870A3 Secure cryptographic methods for electronic transfer of information
04/1997
04/30/1997CN1148765A Method of manufacturing generic meters in key management system
04/29/1997US5625695 Process for generating DSA signatures with low-cost portable apparatuses
04/29/1997US5625693 Apparatus and method for authenticating transmitting applications in an interactive TV system
04/29/1997US5625692 Method and system for a public key cryptosystem having proactive, robust, and recoverable distributed threshold secret sharing
04/27/1997CA2187970A1 Secure network protocol system and method
04/24/1997WO1997015161A1 Subscriber authentication in a mobile communications system
04/24/1997WO1997015132A1 Scrambled information transmitting and receiving
04/24/1997CA2234655A1 Subscriber authentication in a mobile communications system
04/23/1997EP0769237A1 A method and apparatus for key transforms to discriminate between different networks
04/23/1997CN1148453A Method for providing blink access to an encryption key
04/22/1997US5623549 Cipher mechanisms with fencing and balanced block mixing
04/22/1997US5623548 Transformation pattern generating device and encryption function device
04/22/1997US5623546 Encryption method and system for portable data
04/22/1997US5623545 Automatic data generation for self-test of cryptographic hash algorithms in personal security devices
04/17/1997WO1997014236A1 Method and apparatus for relaying digitally signed messages
04/17/1997WO1997014229A1 Process and device for the scalable coding of audio signals
04/17/1997WO1997014146A1 Optical disk, bar code formation method for optical disk, optical disk reproduction apparatus, and marking method, laser marking method for optical disk, and method of optical disk production
04/17/1997WO1997014120A1 Improvements to smart cards
04/17/1997WO1997014119A1 Authentication method for a wired-logic microcircuit
04/17/1997WO1997007657A3 Parameterized hash functions for access control
04/16/1997EP0768775A2 Method and apparatus for mutual authentication according to the challenge/response principle
04/16/1997EP0768774A2 Method and apparatus for data encryption using a key generation hierarchy
04/16/1997EP0768773A1 Method of establishing a common key for authorised users by means of a threshold scheme
04/16/1997EP0768595A1 System and method for providing masquerade protection in a computer network using session keys
04/16/1997EP0767957A1 Method and apparatus for copy protection for various recording media
04/16/1997EP0606401A4 Apparatus and method for providing network security.
04/16/1997CN1147741A Scrambled image communication device
04/16/1997CN1147735A Communication method and communication device
04/16/1997CN1147733A Descrambler
04/16/1997CN1147656A Cryptographic key management and validation system
04/15/1997US5621799 Scrambled transmission system
04/15/1997US5621798 Method and apparatus for cooperative messaging
04/15/1997US5621796 Transferring information between transaction networks
04/15/1997US5621795 Key distribution system for generating/maintaining cryptographic keys
04/15/1997CA2181972A1 Procedure for establishing a common key for authorized persons by a central office
04/15/1997CA2082649C Electronic security system
04/10/1997WO1997013342A1 Public key cryptography process based on the discrete logarithm
04/10/1997WO1997013341A1 System for authenticating the location of remote users
04/10/1997WO1997013340A1 Network security device
04/10/1997CA2233962A1 System for authenticating the location of remote users
04/09/1997EP0767286A2 Remote keyless entry and immobilization system for automotive use
04/09/1997EP0766902A2 User authentication method and apparatus
04/09/1997EP0766894A1 Process for generating electronic signatures, in particular for smart cards
04/09/1997EP0750814A4 Method and apparatus for utilizing a token for resource access
04/09/1997EP0611506B1 Method, sender apparatus and receiver apparatus for modulo operation
04/08/1997US5619576 Variable-key cryptography system
04/08/1997US5619575 Pseudorandom composition-based cryptographic authentication process
04/08/1997US5619573 Vehicle security device with electronic use authorization coding
04/08/1997US5619572 Method and apparatus for providing secure communications for a requested call
04/03/1997WO1997012461A1 Method for encryption of information
04/03/1997WO1997012460A1 Document authentication system and method
04/03/1997WO1997012459A1 A method for encryption of file
04/03/1997WO1997012330A1 Method and apparatus for information processing using cellular automata transform
04/03/1997DE19600771A1 Security module for electronic cash security components
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