Method for encoding data on a chip card by means of constant-weight codes
US9886597B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 17, 2014 |
| Grant date | Feb 6, 2018 |
| Priority date | — |
| Expiry date | Jan 21, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/34
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The invention relates to a data-processing method that includes encoding a plurality of data of n bits into code words having a predefined constant Hamming weight, characterized in that said method also includes using (4000) encryption operations or arithmetic operations on the resulting code word(s) and also in that encoding each datum includes: decomposing (100) the datum into a plurality of m bit sequences to be encoded, m strictly being less than n; encoding (300) each bit sequence into a partial code word, each having a predefined Hamming weight, such that the sum of the Hamming weights of the partial code words are equal to the Hamming weights of the code word; and concatenating (300) the partial code words such as to produce the code word corresponding to the datum. The invention also relates to a data transmission method and to an electronic circuit configured to implement said methods.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.