Providing selective data broadcast receiver addressability

Provision of secure access to external resources from a distribu

Pseudo-random binary sequency generator

Pseudorandom number generation and cryptographic authentication

Pseudorandom number generation and crytographic authentication

Pseudorandom, iterative method and apparatus for automatically c

Public key cryptographic mechanism

Public key cryptosystem key management based on control vectors

Public key data communications system under control of a portabl

Public key diversification method

Public key sterilization

Public key/signature cryptosystem with enhanced digital signatur

Public network merchandising system

Public/key date-time notary facility

Public/key date-time notary facility

Quantum cryptography

Quantum key distribution using non-orthogonal macroscopic signal

Radio frequency transponder stored value system employing a secu

Radio port controller in a wireless personal communications syst

Radiotelephone installation for prepayment operation with securi