Common cryptographic key verification in a transaction network
Communication device which performs two-way encryption authentic
Communication method and apparatus for carrying out cipher commu
Communication method and system with encryption of information
Communication network access method and system
Communication security accessing system and process
Communication system
Communication system and methods for enhanced information transf
Communication system capable of quickly and impartially arbitrat
Communication system for portable appliances
Communications format for a subscription television system permi
Communications network
Communications network using an enciphering and deciphering devi
Communications system capable of communicating encrypted informa
Communications system with tandem scrambling devices
Compact certification with threshold signatures
Compact digital signatures
Compound principals in access control lists
Computer access control system and method
Computer access security code system