Encoding method, encoding-decoding apparatus, and code communications system
US6683953B1 · kind B1 · utility
12Cited by
1References
15Claims
0Family size
Assignees
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Key dates
| Filing date | Jul 26, 1999 |
| Grant date | Jan 27, 2004 |
| Priority date | — |
| Expiry date | Jul 26, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/0618
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Instead of immediately encrypting a plain text, a n-bit plain text is first converted to a m-bit of expanded plain text in order to limit the weight of the plain text to w, and that expanded plain text is then encrypted. By first converting the plain text to the expanded plain text wherein the weight has been limited, a smaller modulus can be used, and therefore the rate (or encryption efficiency) rises.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.