Method and apparatus for changing the master key in a cryptograp
Method and apparatus for collaborative document control
Method and apparatus for communication of video, audio, teletext
Method and apparatus for continuously acknowledged link encrypti
Method and apparatus for continuously acknowledged link encrypti
Method and apparatus for controlling access to a communication s
Method and apparatus for controlling access to digital signals
Method and apparatus for controlling country specific frequency
Method and apparatus for controlling country specific frequency
Method and apparatus for controlling the use of a public key, ba
Method and apparatus for cooperative messaging
Method and apparatus for creating and using an encrypted digital
Method and apparatus for creating communities of trust in a secu
Method and apparatus for creating, supporting, and using travell
Method and apparatus for creating, supporting, and using travell
Method and apparatus for credit card verification
Method and apparatus for cryptographic authentication
Method and apparatus for cryptographically secure algebraic...
Method and apparatus for crytographically protecting data
Method and apparatus for data authentication in a data communica