Partial revocation list
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United States of America Patent
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Sep 1, 2015
Grant Date -
Dec 9, 2010
app pub date -
Aug 18, 2010
filing date -
Dec 22, 2004
priority date (Note) -
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status (Latency Note)
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Abstract
A partial revocation list and a system and method for using the partial revocation list for tracking the authenticity of replacement cartridges in a manufactured device to inhibit cloning of the cartridges is provided. A revocation pool is maintained by a manufacturer who chooses a partial revocation list from the revocation pool to store in the memory of the cartridge. The device stores its own revocation list, informs the manufacturer of cartridges which have been used and checks when a new device is installed to ensure a cloned replacement is not being used. The partial revocation list distributes enough revocation information to devices to statistically impair the cartridge yield of a cloning operation.
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