Secure proxy signing device and method of use
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United States of America Patent
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Sep 17, 2002
Issued Date -
N/A
app pub date -
Dec 19, 1997
filing date -
Dec 19, 1997
priority date (Note) -
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Abstract
A digital signature of a document is formed in a digital signing device by using a private key stored in the digital signing device. A number of data items are supplied to the signing device. The signing device uses the data items to derive and authenticate a document hash. The digital signature is only formed if the derived document hash is authenticated.
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