Patent ID: 8327449
Filing Date: 2012-12-04
Classification: G11B,H04L

Abstract:
1. An information processing apparatus for performing a process for reproducing content from a removable information recording medium, the information processing apparatus comprising: a processor; and a memory device storing instructions, which when executed by the processor, cause the processor to: (a) generate a copy control key using copy/play control information which is stored on the removable information recording medium, said generated copy control key corresponding to each of a plurality of content management units stored on the removable information recording medium, said copy/play control information being: (b) obtain an encrypted unit key which is stored on the removable information recording medium; (c) generate a decrypted unit key by, using said generated copy control key, decrypting the encrypted unit key; (d) generate, using the decrypted unit key, a block key; and (e) decrypt, using the generated block key, encrypted content stored on the removable information recording medium, the encrypted content being distinct and separate from the encrypted unit key.