Sequence numbering mechanism to ensure execution order integrity of inter-dependent smart card applications
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United States of America Patent
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-
Dec 3, 2002
Issued Date -
N/A
app pub date -
Jun 26, 2001
filing date -
May 11, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Software code of a software program is executed in a multi-processor computer environment. The software code includes a first portion and a second portion. The first portion is executed in a computer. The second portion is executed in one or more tamper-resistant external devices which are in communication with the computer. The second portion includes a plurality of different blocks of code. At least some of the blocks have sequence data associated therewith. If sequence data exists in the current block of code to be executed in the one or more external devices, then the sequence data is used to determine if execution of the block of code is permissible or should be inhibited. The sequence data includes predecessor data and successor data.
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