Reversible and reusable authentication system for secure documents
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United States of America Patent
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Aug 31, 2004
Issued Date -
N/A
app pub date -
Feb 6, 2002
filing date -
Feb 6, 2002
priority date (Note) -
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Abstract
The invention is a method and system that is useful to authenticate security paper. Specifically, the present invention relates to a method and system that allows security paper to be authenticated more than once without destroying the authentication mechanism. An authenticating solution is applied to a surface of an authentic document or other authentic security paper. Subsequent application of an activating solution to a surface of a document containing the authenticating solution causes a reversible color change allowing the document to be authenticated.
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