DATA EXCHANGE PROCESSING DEVICE AND DATA EXCHANGE PROCESSING METHOD

摘要

A data exchange processing device is provided with an encryption engine unit which performs encryption and validation, a stream control means for outputting content while encrypting the content using the encryption engine unit, an illegal device list updating means for performing validation processing with respect to an illegal device list using the encryption engine unit, and a state managing means for outputting a grant notification to the illegal list updating means if an interval in which the load of encryption at the encryption engine unit is less than in other intervals is detected on the basis of meta information related to the content and processing position according to the stream control means. The illegal device list updating means, once receiving the grant notification from the state managing means, starts performing validation processing with respect to the illegal device list using the encryption engine unit.