Encryption device, encryption method and storage medium storing its program
US8335313B2 · kind B2 · utility
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13Claims
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Key dates
| Filing date | Jul 12, 2010 |
| Grant date | Dec 18, 2012 |
| Priority date | — |
| Expiry date | Jun 16, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/805
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
When processing a data conversion function of a MISTY structure, such as the FO function of MISTY1, the logical calculation result t3 of the exclusive OR 614 of the process result of the FI function 602 of the MISTY structure in the second stage and a logical calculation result t1 of an exclusive OR 612 of the MISTY structure in the first stage is not stored in a register. The logical calculation result t3 and the logical calculation result of respective exclusive OR 642 and 643 are subject to a direct exclusive OR with the respective exclusive OR 642 and 643.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.