Block cipher apparatus using auxiliary transformation
US7760870B2 · kind B2 · utility
2Cited by
13References
5Claims
0Family size
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Key dates
| Filing date | Oct 28, 2005 |
| Grant date | Jul 20, 2010 |
| Priority date | — |
| Expiry date | Apr 22, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/24
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
It is desired to share one circuit by an encryption unit 200 and a decryption unit 500. A normal data transformation unit (FL) 251 and an inverse data transformation unit (FL−1) 273 are located at point symmetry on a non-linear data transformation unit 220, and a normal data transformation unit (FL) 253 and an inverse data transformation unit (FL−1) 271 are located at point symmetry on the non-linear data transformation unit 220. Therefore, the encryption unit 200 and the decryption unit 500 can be configured using the same circuits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.