Electronic funds transfer system with means for verifying a personal identification number without pre-established secret keys
US4797920A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 1, 1987 |
| Grant date | Jan 10, 1989 |
| Priority date | — |
| Expiry date | May 1, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06Q20/4012
- WIPO fieldIT methods for management
- WIPO sectorElectrical engineering
Abstract
An electronic funds transfer system employs a means to verify a personal identification number PE entered by the user with the correct PIN (PT) stored at the host terminal. The remote and host terminals each generate an encryption key, and encrypt PE and PT at the respective terminals. These values are transmitted to the other terminal, where they are re-encrypted using the other encryption key. The double-encrypted numbers are then compared. The user-entered PIN can thus be verified without the need to share en encryption key between the remote and host terminals. The encryption transformation is of the type where the results of successive encryptions does not depend on the order of encryption.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.