ENCRYPTION DEVICE, DECRYPTION DEVICE, LICENSE ISSUING DEVICE, AND CONTENT DATA GENERATION METHOD

摘要

A plurality of resources such as an image, audio, and data broadcast contained in a content are separately stream-encrypted. A reception side separates the encrypted streams for each of resources and acquires an initialization packet in the encrypted streams. According to the initialization packet, a decryption algorithm is initialized and a decryption key is acquired for decrypting the respective resources.