Information processing apparatus and information processing method for determining access permission

摘要

An information processing apparatus includes a data processor and a storage. The storage is divided into a protected area to which access is limited and a general purpose area which is freely accessible, and configured to store in the general purpose area encrypted content, and an encrypted title key obtained by encrypting a title key to be applied to decrypt the encrypted content, and store in the protected area a binding key applied to encrypt the title key, and a hash value of the encrypted title key. The data processor is configured to determine, in response to a request for access to the protected area from an external apparatus, whether or not to permit the access, and permit, only when access permission determination is made, the access to the protected area.

主权项

1. An information processing apparatus, comprising:
a storage unit comprising a protected area to which access is limited and a general purpose area, wherein the protected area comprises a plurality of divisions, the storage unit being operable to:
store in the general purpose area:
encrypted content, andan encrypted title key to be applied to decrypt the encrypted content, andstore in the protected area:
a binding key applied to encrypt the title key, anda hash value of the encrypted title key; and a data processor operable to:
determine, in response to a request for access to the protected area along with a certificate from an external apparatus, whether or not to permit the access, wherein the certificate comprises information corresponding to read permitted divisions and write permitted divisions among the plurality of divisions of the protected area; andpermit, only when access permission determination is made, the access to the protected area.