Patent ID: 7721343
Filing Date: 2010-05-18
Classification: G06F,G11B

Abstract:
1. A software information reproducing apparatus to decrypt encrypted content from a medium and to obtain decrypted content under control of a control section, the software information reproducing apparatus comprising: a record of a first media key block for software and a second media key block for hardware being recorded in the medium in which contents of the first and second media key blocks are different, a record of key conversion data being recorded in the medium, and an area to record an encrypted title key, the encrypted content, and a media ID being provided on the medium; a first device key set corresponding to the first media key block is provided in a software apparatus, the software apparatus comprising a recording/reproducing drive and a personal computer in which the encryption/decryption of the content is performed by application software, and the first device key set is configured to update; and a second device key set corresponding to the second media key block is provided in a hardware apparatus, the hardware apparatus comprises a recording/reproducing drive and a data coding/decoding processing circuit which are integrally incorporated in the same housing, and the second device key set is fixed and unchanged, wherein the software information apparatus comprises: