Methods and apparatus for enhanced CMEA employing enhanced transformations
US6377687B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 29, 1998 |
| Grant date | Apr 23, 2002 |
| Priority date | — |
| Expiry date | Jul 29, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/80
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Methods and apparatus for enhanced CMEA, or ECMEA, processing. A forward ECMEA and a reverse ECMEA process are provided. The forward ECMEA process decrypts text encrypted by the reverse ECMEA process and the reverse ECMEA process decrypts text encrypted by the forward ECMEA process. The forward ECMEA process employs a transformation, an iteration of the CMEA process, and an inverse transformation. The reverse ECMEA process employs a reverse transformation, an iteration of the CMEA process, and a reverse inverse transformation. The transformations and inverse transformations, and the iteration of the CMEA process, employ secret offsets to improve security. The transformations and the iteration of the CMEA process also employ an enhanced tbox function using an involutary lookup table.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.