OPTICAL DISK OPTICAL RECORDER OPTICAL REPRODUCING DEVICE ENCRYPTED COMMUNICATION SYSTEM AND AUTHORIZING SYSTEM FOR USE OF PROGRAM

摘要

It simplifies the operation procedure and various procedures of the application system of the network-use optical disk.;A negative information recording area is provided on the optical disc, and the encryption key and the decryption key of different IDs or passwords are recorded at the factory. The user can omit the procedure or procedure by using an ID for decryption of the software, an encryption key for encryption, and a decryption key for encryption.