DATA RECORDING DEVICE, DATA PROCESSING SYSTEM USING THE SAME, AND COPY PROTECTING METHOD AND RECORDING MEDIUM

摘要

PROBLEM TO BE SOLVED: To realize a storage device capable of safely recording digital contents being objects of copy protection. SOLUTION: Since an authenticator 1161 for authenticating equipment is provided in the bus interface of a DVD(digital versatile disk)-RAM drive 116, contents which could not be recorded so for whose copy is possible one time can be safely recorded in a storage device by recording transmitted encripted contents (encripted contents) as they are. Moreover, only authorized devices are allowed to perform releasing of encription of storage contents of the storage device by authentication with the storage device by writing content cypher releasing key (K content) in an area which can not be read out from a system.