Data copyright management method

Data delivery method and data delivery system using sets of...

Data processing method and system of same portable device...

Data processing system, data processing method, and program...

Data recording/reproducing method, data...

Data transmission apparatus and method, data receiving...

Data transmitting apparatus, data transmitting method, data...

Decentralized systems methods and computer program products...

Deriving a symmetric key from an asymmetric key for file...

Determining a session encryption key during a...

Device and method for calculating a result of a modular...

Digital certificate management system, digital certificate...

Digital message encryption and authentication

Digital signature protocol

Distributed encryption methods and systems

Distributed group key management scheme for secure...

Distribution of broadcast content for remote decryption and...

Distribution of encrypted software update to reduce attack...

Domain-based digital-rights management system with easy and...