Techniques for carrying out seed or key derivation
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United States of America Patent
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Nov 15, 2011
Grant Date -
N/A
app pub date -
Sep 28, 2007
filing date -
Sep 28, 2007
priority date (Note) -
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Abstract
A technique carries out seed (or key) derivation within an electronic apparatus (e.g., a hand holdable electronic apparatus such as a token, an authentication server, etc.). The technique involves acquiring a stored representation of a derived seed, the stored representation of the derived seed resulting from an earlier-performed cryptographic operation based on a higher-level seed. The technique further involves (i) performing a current cryptographic operation based on a stored representation of the higher-level seed, the current cryptographic operation resulting in a current representation of the derived seed, and (ii) providing a corruption detection signal indicating whether the current representation of the derived seed matches the stored representation of the derived seed.
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