Software protection system using a single-key cryptosystem, a ha

Software reproduction apparatus

Sound masking in phase reversal TV scrambling system

Speech scrambler

Speech scramblers

Spread spectrum watermark for embedded signalling

Stand-alone utility device with antitheft code with method for i

State sequence dependent read only memory

Steganographic techniques for securely delivering electronic dig

Storage device having a nonvolatile memory for storing user chan

Storage medium for preventing an illegal use by a third party

Storage medium for preventing an irregular use by a third party

Storage protection utilizing public storage key control

Support for portable trusted software

Synchronizing circuit

System and apparatus for protecting computer software

System and method for access control for portable data storage m

System and method for access control for portable data storage m

System and method for authenticating software carriers

System and method for communications security protection