System and method for transmitting desired digital video or digi

System and method of protecting integrity of computer data and s

System for automatic decryption of file data on a per-use basis

System for automatic decryption of file data on a per-use basis

System for computer software protection

System for controlling access and distribution of digital proper

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