Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Particular communication authentication technique
Reexamination Certificate
2001-09-28
2011-10-18
Henning, Matthew (Department: 2491)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Particular communication authentication technique
C726S028000, C726S030000, C380S051000
Reexamination Certificate
active
08041952
ABSTRACT:
Systems and methods for validating electronic signatures contained in a printable document prior to allowing the document to be printed. The systems and methods may be incorporated into a printing device or a computer. Documents without electronic signatures are printed normally. If the document contains one or more electronic signatures, then the electronic signature(s) must be validated before the document is allowed to print. Validation is accomplished by comparing a public key contained in the electronic signature to a public key stored in an electronic signature database. If the electronic signature is validated, then the document may print.
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Henning Matthew
Hewlett--Packard Development Company, L.P.
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