Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2010/01/01 Vol. E93-ANo. 1pp. 194-201 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Application Keyword: battery backup SRAM (BB-SRAM), cryptographic SoC, IPTV, key protection, security,