Self-authentication of value documents using encoded indices

• US 6,611,598 B1
• Filed: 10/16/2000
• Issued: 08/26/2003
• Est. Priority Date: 01/12/1998
• Status: Expired due to Term

• Current Assignee: Unisys Corporation
• Original Assignee: Unisys Corporation
• Inventors: Hayosh, Thomas David
• Primary Examiner(s): Smithers, Matthew
• Application Number:
  US09/688,647
• Time in Patent Office: 1,044 Days
• Field of Search: 713/168, 713/179, 713/180, 713/175, 713/176, 705/62, 705/64, 705/67, 380/54
• US Class Current: 380/54
• CPC Class Codes: B42D 25/29 Securities; Bank notes
• CPC Class Codes: G06Q 20/042 characterized in that the payment protocol involves at least one cheque
• CPC Class Codes: G06Q 20/382 insuring higher security of transaction
• CPC Class Codes: G06Q 20/3821 Electronic credentials
• CPC Class Codes: G06Q 20/401 Transaction verification
• CPC Class Codes: G06Q 20/4012 Verifying personal identification numbers [PIN]
• CPC Class Codes: G07D 7/0043 using barcodes
• CPC Class Codes: G07D 7/0047 using checkcodes, e.g. coded numbers derived from serial number and denomination
• CPC Class Codes: G07F 7/08 by coded identity card or credit card or other personal identification means without personal verification means G07F7/02
• CPC Class Codes: G07F 7/125 Offline card verification

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.

Claims

1. 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.

2. The method of claim 1, which further includes the step of:

(b) encoding data in said assemblage data group which includes;

a numerical amount involved in each of said documents;

the name of the payee or recipient of each of said documents; and

, a digital certificate field for each of said documents.