Method and apparatus for centralized encryption key calculation
US6334185A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 8, 1998 |
| Grant date | Dec 25, 2001 |
| Priority date | — |
| Expiry date | Sep 8, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W12/04
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A system and method for encrypting transmissions between a plurality of communication nodes and a mobile station, wherein the algorithm for generating an encryption key resides within a first communications node. A second communications node requiring encryption between the node and a mobile station requests an encryption key from the first communications node through a PMAP interface interconnecting the nodes. The first node generates the encryption key and a countersign and transmits them back to the second communications node. The transmitted countersign is compared with a countersign provided by the mobile station, and if they match, transmissions from the second communications node to the mobile station are encrypted using the provided key.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.