| 摘要 |
<P>PROBLEM TO BE SOLVED: To perform a procedure relating to transfer of right between devices without through a server without changing unique identification information of a device. <P>SOLUTION: In a first device TA of a right transfer origin converts the encryption bind status of a key encryption key DREK included in an authority object RO from a bind with a bind key KA of the first device TA to a bind with a domain key KD. Then, a right object RO including the bind-converted key encryption key KREK is transferred with encryption content EC to a second device TB as right transfer destination, and the domain key KD is transferred through a secure session to the second device TB. <P>COPYRIGHT: (C)2007,JPO&INPIT |
