Patent ID: 8929553
Filing Date: 2015-01-06
Classification: H04L

Abstract:
1. A method for generating data for use in generating an authenticity certificate to be stored on a media, said method comprising: receiving, by a central processor of a computer system from a requester entity, a request for a step certificate, said step certificate authenticating an involvement of the requester entity about an object, said request comprising a media identifier, a media key block, an object identifier, a requester entity type of the requester entity, and a requester identity certificate of the requester entity, wherein the object identifier identifies the object and is unique to the object, wherein the media identifier identifies the media and is unique to the media, wherein the media key block is a data block of the media providing access to a media key used to unlock a title key stored on the media, and wherein the title key is configured to encrypt data stored on the media; after said receiving the request, said central processor hashing the object identifier; after said hashing the object identifier, said central processor creating a signature comprising the hashed object identifier, the requester entity type, a certifier identity certificate of a certifier entity that has certified the authenticity of the object, and the requester identity certificate; said central processor generating a hashing result by hashing a concatenation of the object identifier, the requester entity type, the certifier entity certificate, the requester identity certificate, and the signature; said central processor generating the step certificate comprising the hashing result; said central processor encrypting the step certificate using a random key; and said central processor sending the encrypted step certificate and an encrypted random key to the requester entity for subsequent writing the step certificate and the encrypted random key on the media, said encrypted random key being based upon the random key, the media identifier, and the media key block.