发明名称 |
Method and device for the checking of the number of access attempts to an electronic store, notably that of an integrated circuit of an object such as a credit card or a buyer's card |
摘要 |
An access trial control device for a card, such as a financial or business transaction card or the like, which is inserted in an access terminal for use and carries a confidential code which is compared with an access code type by the user on the terminal. For each access trial the result, acceptance or refusal, of the comparison is permanently recorded by non volatile memory means in the card. The number of consecutive access trials refused is counted in a counter and is detected by a control circuit which disables the card when such number reaches a predetermined value. Each accepted access trial resets the counter to zero.
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申请公布号 |
US4439670(A) |
申请公布日期 |
1984.03.27 |
申请号 |
US19820440697 |
申请日期 |
1982.11.10 |
申请人 |
ELECTRONIQUE MARCEL DASSAULT |
发明人 |
BASSET, JEAN-CLAUDE;BELENFANT, GUY |
分类号 |
G06K19/073;G07F7/10;(IPC1-7):G06K5/00 |
主分类号 |
G06K19/073 |
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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