Recorder

摘要

Memory card (110) decodes data delivered to data bus (BS3) and extracts session key (Ks1) sent from server from data. Based on session key (Ks1), encrypting section (1406) encrypts public encryption key (KPm(1)) of memory card (110) and delivers it to server through data bus (BS3). Memory card (110) receives data including license key (Kc) and license (ID) encrypted with public encryption key (KPm(1)) different with memory card to memory card, decrypts data, encrypted it again with uniquely given secret key (K(1)), and stores it in memory (1415).