Key conversion system and method
US6857075B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 11, 2000 |
| Grant date | Feb 15, 2005 |
| Priority date | — |
| Expiry date | Apr 29, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W36/1443
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The present invention is a key conversion system for deterministically and reversibly converting a first key value of a first communications system into a second key value of a second communication system. For example, the key conversion system generates a first intermediate value from at least a portion of the first key value using a first random function. At least a portion of the first intermediate value is provided to a second random function to produce a second value. An exclusive-or is performed on at least a portion of the first key value and at least a portion of the second value to generate a second intermediate value. At least a portion of the second intermediate value is provided to a third random function to produce a third value. By performing an exclusive-or on at least a portion of the third value and at least a portion of the first intermediate value, the key conversion system produces at least a first portion of the second key value, and at least a second portion of the second key value is produced as the second intermediate value. The key conversion system is reversible or bi-directional in that, if the wireless unit is handed off back to the first communications …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.