Cryptographic device with encryption blocks connected parallel
US6347143B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 15, 1998 |
| Grant date | Feb 12, 2002 |
| Priority date | — |
| Expiry date | Dec 15, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/125
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A cryptographic device includes a de-multiplexer, a plurality of encryption blocks, a plurality of permutation blocks, and a multiplexer. The encryption blocks encrypt data to produce encrypted data. The de-multiplexer receives data portions from a plaintext message and directs the data portions to one of the encryption blocks, based on a value within a path control session key. Each permutation block is associated with an encryption block. Each permutation block permutes encrypted data from the encryption block associated therewith. The multiplexer receives data portions from each of the plurality of permutation blocks to produce an encrypted output data stream.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.