RIGHT INFORMATION ENCRYPTING MODULE, NONVOLATILE RECORDING APPARATUS, RIGHT INFORMATION RECORDING SYSTEM, RIGHT INFORMATION DECRYPTING MODULE, RIGHT INFORMATION READING SYSTEM, AND RIGHT INFORMATION RECORDING/READING SYSTEM

摘要

A right information encrypting module (110a) comprises a key generating part (111a), a right information encrypting part (112a), and a key management information generating part (113a). Key information (Km) and key management information (Mm) associated with right information are generated and then recorded into a concealment recording module (130a). On the other hand, the right information is encrypted, and then the right information (Enc_a) (ROm,Km) as encrypted and the key management information (Mm) are recorded into a recording module (140a). This can eliminate the possibility of a capability shortage of a concealment area caused by an increase in the data size of the right information including the key information and usage restricting information for a content.