发明名称 |
Semiconductor integrated circuit and data carrier with sand integrated circuit |
摘要 |
The present invention provides a smaller non-contact IC card that includes a counter for measuring time from when the non-contact IC card enters communication coverage of a reader/writer until it actually receives a command from the reader/writer. By using the time measured by the counter as a random-number value, a high-speed, aperiodic, equally random and hard-to-predict random-number data can be generated, thus achieving minimization of non-contact IC cards. <IMAGE>
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申请公布号 |
EP1331599(A2) |
申请公布日期 |
2003.07.30 |
申请号 |
EP20030001261 |
申请日期 |
2003.01.21 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
NAKANE, GEORGE;OHYA, MITSUYOSHI |
分类号 |
G06K7/00;G06K19/07;G06K19/073;(IPC1-7):G06K19/07 |
主分类号 |
G06K7/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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