LandOfFree - US Patents - Listing for Cryptography

Cryptography – Key management – Having particular key generator

Method of and an apparatus for generating pseudo-random numbers

Cryptography – Communication system using cryptography – Data stream/substitution enciphering

Method of and an arrangement for digital signal encryption

Cryptography – Key management – Having particular key generator

Method of and apparatus for determining a key pair and for...

Cryptography – Key management

Method of and apparatus for encrypting and transferring files

Cryptography – Particular algorithmic function encoding – Nbs/des algorithm

Method of and apparatus for encryption and decryption of communi

Cryptography – By modifying optical image

Method of and apparatus for manipulating digital data works

Cryptography – Key management – Having particular key generator

Method of and apparatus for providing automatic security control

Cryptography – Video cryptography – Video electric signal modification

Method of and apparatus for retaining and verifying of data on r

Cryptography – Cryptanalysis

Method of and apparatus for scrambling a video signal with full

Cryptography – Key management – Having particular key generator

Method of and apparatus for selective resynchronization in a dig

Cryptography – Particular algorithmic function encoding – Nbs/des algorithm

Method of and circuit arrangement for checking a smart card

Cryptography – Communication system using cryptography – Data stream/substitution enciphering

Method of and system for encrypting messages

Cryptography – Key management – Having particular key generator

Method of and system for scrambling/descrambling sound

Cryptography – Key management – Key distribution

Method of and system for writing-in key information

Cryptography – Particular algorithmic function encoding – Nbs/des algorithm

Method of authenticating a terminal in a transaction execution s

Cryptography – Video cryptography – Video electric signal modification

Method of authenticating information, disk playback...

Cryptography – Key management – Key distribution

Method of authentication and storage of private keys in a...

Cryptography – Particular algorithmic function encoding – Nbs/des algorithm

Method of authentication with improved security for secrecy of a

Cryptography – Equipment test or malfunction indication

Method of avoiding accidental actuation of maintenance equipment