Counterfeit-proof identification card
US5694471A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 3, 1994 |
| Grant date | Dec 2, 1997 |
| Priority date | — |
| Expiry date | Aug 3, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/805
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A system and method for preventing counterfeiting of an identification or transaction card, and for verifying that the user of the card is an authorized user, involves the use of a unique, unalterable serial number and an exclusive OR function to generate a private key protected digital signature. The digital signature is stored on the card together with a card issuer record which contains sufficient information to authenticate the record. User authentication is provided by a personal identification number which is stored on the card. The personal identification number is generated by enciphering the serial number using a password as the key. The same card can be used to store a plurality of card issuer records, each including its own digital signature, and with user authentication for all records provided by a single personal identification number.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.