LandOfFree - US Patents - Listing for Cryptography

Cryptography – Communication system using cryptography – Symmetric key cryptography

Content-protected digital link over a single signal line

Cryptography – Key management

Contents data transmission/reception system, contents data...

Cryptography – Key management – Key distribution

Contents distribution system

Cryptography – Electric signal modification – Having magnetic record carrier

Contents management method, content management apparatus,...

Cryptography – Video cryptography

Contents management system

Cryptography – Communication system using cryptography – Symmetric key cryptography

Contents transmission control method with user authentication fu

Cryptography – Communication system using cryptography – Wireless communication

Continuous authentication using an in-band or out-of-band side c

Cryptography – Key management – Having particular key generator

Continuous cipher synchronization for cellular communication sys

Cryptography – Communication system using cryptography – Fiber optic network

Continuous variable quantum encryption key distribution system

Cryptography – Video cryptography – Video electric signal modification

Control 3 signal synthesis

Cryptography – Key management – Having particular key generator

Control and metering system for pay television over a cable netw

Cryptography – Electric signal modification – Having mechanical control of signal encryption

Control circuits for electric coding machines

Cryptography – Video cryptography – Video electric signal modification

Control of usage of contents in digital broadcasts

Cryptography – Video cryptography – Video electric signal modification

Control of usage of contents in digital broadcasts

Cryptography – Particular algorithmic function encoding – Nbs/des algorithm

Controlled acceptance mail payment and evidencing system

Cryptography – Particular algorithmic function encoding – Nbs/des algorithm

Controlled authorization of descrambling of scrambled programs b

Cryptography – Video cryptography – Video electric signal modification

Controlled cryptoperiod timing to reduce decoder processing...

Cryptography – Particular algorithmic function encoding – Nbs/des algorithm

Controlled dissemination of digital information

Cryptography – Particular algorithmic function encoding – Nbs/des algorithm

Controlled modular cryptography apparatus and method