CONTENT PROCESSING DEVICE, CONTENT SHARING SYSTEM, AND CONTENT PROCESSING METHOD

摘要

Disclosed is a content processing device provided with: a storage unit (138) for storing a licence encryption key; a licence decryption unit (137) for acquiring a content key by decrypting an encrypted content key included in licence information acquired from an external storage medium (300), said decryption being performed using the licence encryption key stored in the storage unit (138); a licence encryption unit (136) for encrypting the content key decrypted by the licence decryption unit (137), said encryption being performed using a public key included in device public information selected from among a plurality of device public information items; and an export licence creation unit (134) for creating an export licence including the content key encrypted by the licence encryption unit (136) and a device identifier included in the device public information selected, and for storing the export licence in the external storage medium (300).