作者: Hiroshi Suu , Akira Miura , Akihiro Kasahara
DOI:
关键词: Database 、 Key (cryptography) 、 Processing methods 、 Identifier 、 Computer science
摘要: Spread of a forged storage medium is prevented suppressing an authentic medium's damage and trouble owner to the minimum. When there update request user key data, history data concerning shown above-mentioned identifier IDm referred to. judged that not being performed within predetermined period, performed. The refused when period.