Data encryption apparatus using odd number of shift-rotations and method
US6304657A · kind A · utility
24Cited by
6References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 29, 1999 |
| Grant date | Oct 16, 2001 |
| Priority date | — |
| Expiry date | Dec 29, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/24
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A data converting unit includes a key adding unit for performing an arithmetic addition modulo 2.sup.32 for input data F and subkey data Ki and outputting the outcome as data G, and a data substituting unit for performing an exclusive-OR operation for corresponding bits in data Rot7(G) obtained by shift-rotating the data G by 7 bits toward higher-order bit positions, data Rot1(G) obtained by shift-rotating the data G by 1 bit toward higher-order bit positions, and the data G itself.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.