Memory authentication for intrinsically safe field maintenance tools
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United States of America Patent
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Apr 28, 2009
Grant Date -
Nov 18, 2004
app pub date -
May 16, 2003
filing date -
May 16, 2003
priority date (Note) -
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Abstract
A memory authentication technique for field maintenance tools is provided. A non-volatile electronic memory includes a unique software identifier. A non-reversible algorithm is applied to the unique software identifier to obtain a result. The result is then encrypted and compared with a stored encrypted result previously stored on the electronic memory. Based upon this comparison, the tool can be fully enabled, fully disabled, or selectively enabled.
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