Methods used in a secure memory card with life cycle phases
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United States of America Patent
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Jan 31, 2012
Grant Date -
Aug 10, 2006
app pub date -
Dec 22, 2005
filing date -
Feb 7, 2005
priority date (Note) -
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Abstract
A secure memory card with encryption capabilities comprises various life cycle states that allow for testing of the hardware and software of the card in certain of the states. The testing mechanisms are disabled in certain other of the states thus closing potential back doors to secure data and cryptographic keys. Controlled availability and generation of the keys required for encryption and decryption of data is such that even if back doors are accessed that previously encrypted data is impossible to decrypt and thus worthless even if a back door is found and maliciously pried open.
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