RECORDER

摘要

A memory card ( 110 ) decodes data delivered to a data bus (BS 3 ) and extracts a session key (Ks 1 ) sent from a server from the data. Based on the session key (Ks 1 ), an encrypting section ( 1406 ) encrypts a public encryption key (KPm ( 1 )) of the memory card ( 110 ) and delivers it to a server through the data bus (BS 3 ). The memory card ( 110 ) receives data including a license key (Kc) and a license (ID) encrypted with the public encryption key (KPm ( 1 )) different with memory card to memory card, decrypts the data, encrypted it again with uniquely given secret key (K( 1 )), and stores it in a memory ( 1415 ).