RECORDING MEDIUM, AUTHORING DEVICE, AND AUTHORING METHOD

摘要

A recording medium contains authoring data having a plurality of formats. Each of the formats has, as common items, a content, a content key for encrypting the content, a Hash value for the content, a medium key for encrypting the content key, and invalidation information for invalidating use of the medium key by an unauthorized device. Among the formats, in the first format, the content is not encrypted and the content key, the Hash value, the medium key, and the invalidation information are dummies, and in the second format, the content is encrypted and the medium key and the invalidation information are dummies.