发明名称 |
DEVICES FOR HIDING OPERATIONS PERFORMED IN A MICROPROCESSOR CARD |
摘要 |
<p>The invention concerns microprocessor cards and, in such cards, various devices for hiding operations performed in the card against fraudulent breaches by analysing the current consumed. The invention is characterised in that it consists in adding in the card a device (20) modifying the consumed current, either by averaging it by integration, or by adding thereto random values by a random signal generator (28) so as to hide the operations performed. In another embodiment, it consists in carrying out simultaneously an operation for making secure and writing in an EEPROM memory, the latter generating chaotic current variations which hide the operation to be made secure.</p> |
申请公布号 |
EP1062633(B1) |
申请公布日期 |
2003.12.17 |
申请号 |
EP19990907717 |
申请日期 |
1999.03.16 |
申请人 |
GEMPLUS |
发明人 |
FEYT, NATHALIE;BENOIT, OLIVIER;NACCACHE, DAVID |
分类号 |
G06F12/14;G06F1/00;G06F21/55;G06F21/77;G06K19/07;G06K19/073;G07F7/10;H04L9/06;(IPC1-7):G06K19/073 |
主分类号 |
G06F12/14 |
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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