System for controlling the distribution and use of composite dig

System for controlling the distribution and use of digital works

System for creating virus diagnosing mechanism, method of creati

System for decrypting encrypted software

System for dispensing gift certificates

System for embedding authentication information into an image an

System for encoding encryption/decryption information into IFF c

System for licensing to use software products

System for preventing global positioning satellite signal recept

System for preventing piracy of recorded media

System for preventing remote detection of computer data from tem

System for preventing software piracy employing multi-encrypted

System for printing encrypted messages with a character generato

System for protecting digital equipment against remote access

System for protection of software in memory against unauthorized

System for providing encryption and decryption of voice and data

System for selectively preventing a software program from being

System for software registration

System for testing the authenticity of a data carrier

System for the printing and reading of encrypted messages