INFORMATION RECORDING MEDIUM, RECORDER, INFORMATION TRANSMISSION SYSTEM, AND DECODING DEVICE

摘要

PROBLEM TO BE SOLVED: To prevent wrong copy of information requiring the protection of security or copyright at the time of decoding encryption information from an information recording medium. SOLUTION: Enciphered encryption information 40 and encryption information 41 where information to decoder this encryption information 40 to original information is enciphered are recorded, and condition information for decoding of encryption information 40 is recorded in this encryption information 41 in the non-encryption state, and encryption information 41 and condition information 42 are used to decode encryption information 40 from the information recording medium 29 in an IC card 4.