Unique time generating device and authenticating device...
Universal secure registry
Updating usage conditions in lieu of download digital rights...
Updating usage conditions in lieu of download digital rights...
Usage dependent ticket to protect copy-protected material
Usage rights grammar and digital works having usage rights...
Usage rights grammar and digital works having usage rights...
Usage rights grammar and digital works having usage rights...
Use of persona object in electronic transactions
User rewards program and associated communications system
User terminal and wireless item-based credit card...
User terminal program designated not to receive contents...
Using a privacy agreement framework to improve handling of...
Using electronic security value units to control access to a...
Using smartcards to enable probabilistic transaction on an...
Using smartcards to enable probabilistic transactions on an...
Utility power meter, metering system and method