Data certification method and apparatus
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United States of America Patent
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May 25, 2010
Grant Date -
Jan 13, 2005
app pub date -
Aug 12, 2002
filing date -
Aug 10, 2001
priority date (Note) -
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Abstract
An apparatus and method for signing electronic data with a digital signature in which a central server comprises a signature server (110) and an authentication server (120). The signature server (110) securely stores the private cryptographic keys of a number of users (102). The user (102) contacts the central server using a workstation (101) through a secure channel which is setup for the purpose. The user (102) supplies a password or other token (190), based on information previously supplied to the user by the authentication server (120) through a separate authentication channel. The authentication server provides the signature server with a derived version of the same information through a permanent secure channel between the servers, which is compared with the one supplied by the user (102). If they match, data received from the user (102) is signed with the user's private key.
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