发明名称 |
Portable data carrier provide with access protection by rendering messages unfamiliar |
摘要 |
The invention relates to a data storage medium having a semiconductor chip which has at least one memory in which an operating program is stored which contains a number of commands, with each command producing signals which can be detected from outside the semiconductor chip. According to the invention, the data storage medium is designed such that data which is used more than once for a calculation process is scrambled using different functions.
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申请公布号 |
US2003079139(A1) |
申请公布日期 |
2003.04.24 |
申请号 |
US20020168549 |
申请日期 |
2002.09.11 |
申请人 |
DREXLER HERMANN;VATER HARALD |
发明人 |
DREXLER HERMANN;VATER HARALD |
分类号 |
G07F7/12;G06F7/72;G06F21/06;G06K19/073;G07F7/10;G09C1/00;H04L9/16;H04L9/18;(IPC1-7):H04L9/32 |
主分类号 |
G07F7/12 |
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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