Programmable data encryption engine
US7283628B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 12, 2002 |
| Grant date | Oct 16, 2007 |
| Priority date | — |
| Expiry date | Jun 3, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/12
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A programmable data encryption engine for performing the cipher function of the data encryption standard (DES) algorithm includes a Galois field linear transformer system (GFLT) responsive to a first input data block to execute an E permutation to obtain an expanded data block and combine it with a key to obtain a second larger intermediate data block in one cycle; and further includes a parallel look-up table system for implementing the unique data encryption standard selection function(s) and for condensing the second larger intermediate data block to a third data block similar to the first input data block in a second cycle and submitting it to the Galois field linear transformer system to execute a second permutation in a third cycle resulting in a data encryption standard cipher function of the first input data block.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.