CHIP CARD PROTECTED AGAINST COPYING AND METHOD FOR PRODUCTION THEREOF
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United States of America Patent
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N/A
Issued Date -
Dec 25, 2008
app pub date -
Mar 28, 2008
filing date -
Mar 29, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A chip card is protected against copying by having a data memory for storage of data that are protected, at least in a sub-region of the data memory, against alteration by users or attackers outside of a privileged group. Members of this group can write an individual identifier for this chip card into this protected memory region once, and can write a digital signature of this identifier to an arbitrary memory region of the data memory. The digital signature can be generated with the use of a secret key for which an associated public key exists with which it can be checked whether the digital signature was generated from the individual identifier with the use of a secret key.
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