Software copying system

Software delivery system, center device, relaying device and use

Software distribution system and software utilization scheme...

Software licensing management system

Software pay per use system

Software protection apparatus and the method of protection utili

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