Self-authentication of value documents using encoded indices
AssigneeUnisys Corporation
InventorThomas David Hayosh
Life of this patent
Estimating the term…
Abstract
A method and system as presented by which valuable documents such as checks, deeds, driver's licenses, and other types of valuable documents can be imprinted with encoded symbols by a printer whereupon multiple assemblages of data can be imprinted on the valued document which is then susceptible to readout by a document reader which will automatically authenticate and verify the originator or the document and its authenticity and obviate any attempts for fraudulent alteration.
Claims2
In an imprinted valuable document having encoded symbols readable by a document reader, a method for enabling subsequent authenticating and verifying non-alteration of said document via a document reader, comprising the steps of:
- (a) imprinting a two-dimensional bar code on said document which includes an assemblage data group of information which, when read by a document reader, will automatically authenticate the source of the document and verify its original data as standing without alteration;
- said assemblage data group including:
- the type and version number of each said documents;
- a personal identification field of the originator of each of said documents;
- a digital certificate which contains a tamper-proof public key belonging to the document issuer to allow the public key to be used for verification;
- and the data of said document;
- b) utilizing a hash function for creating a message digest which is then signed utilizing a private key from a 2-key digital signature system;
- and,
- c) incorporating a digital signature which can be verified by using a public key and known hashing algorithm when the said document is passed through a document reader.
Dependencies are inferred from the claim text.