LandOfFree - US Patents - Listing for Cryptography

Cryptography – Communication system using cryptography – Symmetric key cryptography

Unauthorized access embedded software protection system

Reexamination Certificate

Cryptography – Key management – Having particular key generator

Unauthorized access monitor

Unauthorized channel jamming signal applying method for CATV sys

Unauthorized use preventing method for optical disks, optical di

Unauthorized use prevention method for optical disks, optical di

Cryptography – Particular algorithmic function encoding – Nbs/des algorithm

Undeniable signature systems

Cryptography – Particular algorithmic function encoding – Nbs/des algorithm

Unforgeable identification device, identification device reader

Cryptography – Particular algorithmic function encoding – Nbs/des algorithm

Unforgeable personal identification system

Cryptography – Key management – Having particular key generator

Unified end-to-end security methods and systems for operating on

Uniform interface for cryptographic services

Cryptography – Video cryptography – Copy protection or prevention

Unique identifier per chip for digital audio/video data...

Reexamination Certificate

Cryptography – Particular algorithmic function encoding – Nbs/des algorithm

Universal broadcast code and multi-level encoded signal monitori

Cryptography – Particular algorithmic function encoding – Nbs/des algorithm

Universal broadcast code and multi-level encoded signal monitori

Cryptography – Key management – Having particular key generator

Universal decoder

Cryptography – Key management – Having particular key generator

Universal decoder

Cryptography – Key management – Having particular key generator

Universal decoder for television signal scramble systems

Cryptography – Key management – Having particular key generator

Universal interactive set-top controller for downloading and pla

Cryptography – Video cryptography – Video electric signal modification

Universal signal processor and method of processing

Cryptography – Key management – Having particular key generator

Universal sofeware key process