Registers – Systems controlled by data bearing records – Credit or identification card systems
Patent
1996-08-29
1999-04-27
Le, Thien Minh
Registers
Systems controlled by data bearing records
Credit or identification card systems
2353825, G06K 500
Patent
active
058981560
ABSTRACT:
The present invention describes a validation stamp for protecting the integrity of a signature affixed to an electronic document. The validation stamp of the present invention includes a validation body and a validation signature. The validation stamp is affixed to a signed document having a document body and a document signature. The document signature and the validation signature are derived from an electronic signature defined by geometric and timing information. Specifically, the validation signature includes the timing information, and possibly the geometric information, of the electronic signature, whereas the document signature includes the geometric information, and not the timing information, of the electronic signature. To verify the integrity of the signature on the electronic document, the validation signature is first decrypted and then compared, along with the document signature, against the signed document and geometric and timing information of a signature known for the authorized signator of the electronic document.
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patent: 5208858 (1993-05-01), Vollert et al.
patent: 5367573 (1994-11-01), Quimby
European Search Report.
Y. Sato et al., "Online Signature Verification Based on Shape, Motion, and Writing Pressure," Proceedings of the International Joint Conference on Pattern Recognition, Munich, Oct. 19-22, 1982; Institute of Electrical and Electronics Engineers, 823-826, vol. 2 (Oct. 19, 1982).
Le Thien Minh
Lucent Technologies - Inc.
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