Method and apparatus for self-authenticating digital records
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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May 16, 2006
Grant Date -
N/A
app pub date -
May 16, 2000
filing date -
May 16, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
A method for proving the validity of a record digitally signed by a user having a digital certificate issued by a certification authority within a hierarchy of certification authorities. The user signs the record, and obtains the digital certificates and certificate revocation information for all the certification authorities in the chain of the hierarchy extending from the user to the root certification authority. A timestamp is applied to the record, the digital certificates and the certificate revocation information to establish a point in time in which all items were created, current and valid. If, at some later point, one or more of the digital certificates either expire or are revoked, the timestamp serves as evidence of the integrity of the signed record.
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