Key escrow systems
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United States of America Patent
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Sep 11, 2007
Grant Date -
N/A
app pub date -
Sep 21, 2000
filing date -
Sep 22, 1999
priority date (Note) -
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Abstract
The storage and retrieval of cryptographic key materials from a storage database utilizes a limited one-way function to create computational barriers. The limited one-way function is asymmetric in nature, in terms of work to compute and work to invert, to store and retrieve encryption keys. The limited one-way function is not intractable, but alternatively, there is some measurable difference in the amount of work required to invert a stored encryption key, compared to the work required for a calculation of the output of the one-way function for storage of an encryption key in a database.
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