Operational method and apparatus over GF(2.sup.m) using a subfield GF(2.sup .
US5227992A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 19, 1991 |
| Grant date | Jul 13, 1993 |
| Priority date | — |
| Expiry date | Jun 19, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2207/7209
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An operation method and apparatus over Galois Field GF(2.sup.m) using a subfield GF(2.sup.m/2). The operation apparatus includes a conversion circuit for converting the elements represented by a basis of GF(2.sup.m) into the elements represented by a basis of GF(2.sup.m/2); an operation circuit for performing an operation over GF(2.sup.m/2) with respect to the elements represented by the basis of GF(2.sup.m/2); and a reversion circuit for reverting the operated elements represented by the basis of GF(2.sup.m/2) to the elements represented by the basis of GF(2.sup.m), thereby performing high speed operation and simplifying circuit construction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.