Key installation system, LSI for implementing the same, and key installation method
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United States of America Patent
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Nov 7, 2006
Issued Date -
N/A
app pub date -
Sep 19, 2002
filing date -
Sep 20, 2001
priority date (Note) -
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status (Latency Note)
Importance
Abstract
In the key installation system for improving the confidentiality and concealment of the key, a first decrypting circuit decrypts an encrypted key EKEY1(EDK(MK1)) using an encrypted key EDK1(MK1) as the key. A second decrypting circuit decrypts an encrypted key EMK1(KEY1) using the output of the second decrypting circuit, that is, an internal key KEY1 as the key. A third decrypting circuit decrypts the encrypted key EDK1(MK1) using the output of the second decrypting circuit, that is, an internal key MK1 as the key, to generate a final secret key DK1.
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