System and method for mutual authentication and secure communications between a postage security device and a meter server
US6192473A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 24, 1996 |
| Grant date | Feb 20, 2001 |
| Priority date | — |
| Expiry date | Dec 24, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07B2017/00967
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A method is provided for establishing mutual authentication and secure communications between an microprocessor-based transaction evidencing device and a microprocessor-based server coupled thereto. A session key K.sub.S is generated at the transaction evidencing device and encrypted with a first key K.sub.1 to form a first message. The first message is sent to the server and decrypted using a second key K.sub.2. In response to the first message a second message is generated at the server and encrypted using the session key K.sub.S. The encrypted second message is sent to the transaction evidencing device and decrypted using the session key K.sub.S. A response to the second message is generated at the transaction evidencing device and is signed using a third key K.sub.3. The signed response is encrypted with the session key K.sub.S and transmitted to the server. The encrypted signed response is decrypted using the session key K.sub.S and the signature is verified using a fourth key k.sub.4.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.