System for controlling access to broadcast transmissions

System for controlling the distribution and use of digital works

System for data encryption and decryption of digital data...

System for delaying the activation of inactivity security mechan

System for detecting improper rewrites of data system for using

System for determination of the equivalence of two objects witho

System for determining a truth of software in an information pro

System for determining direct and indirect user access privilege

System for determining successful reception of a message

System for enabling information marketplace

System for enabling lazy-revocation through recursive key...

System for encoding data presented with a first coding device an

System for encrypted file storage optimization via...

System for encrypted information transmission

System for encrypting broadcast programs in the presence of comp

System for encrypting broadcast programs in the presence of...

System for encryption of partitioned data blocks utilizing publi

System for ensuring that the blinding of secret-key certificates

System for granting ownership of device by user based on request

System for implementing business processes using key server...