发明名称 |
СПОСОБ И УСТРОЙСТВО ДЛЯ ВЫПОЛНЕНИЯ КРИПТОГРАФИЧЕСКОГО ВЫЧИСЛЕНИЯ |
摘要 |
A cryptographic calculation is carried out in an electronic component according to a specific cryptographic algorithm including at least one specified non-linear operation on blocks of data of k bits, k being a whole number of more than 2. Several blocks of masked intermediate data of j bits are generated from an initial block of data of k bits, j being a whole number that is smaller than k. Then a non-linear operation S is applied to at least one of the masked intermediate data blocks of j bits with the aid of a substitution table with 2 inputs producing a modified data block of j bits. The modified data block of j bits and at least some of the masked intermediate data blocks of j bits are combined to form a result block of k bits corresponding to the initial data block of k bits by means of a transformation including the specified non linear operation. |
申请公布号 |
RU2007101704(A) |
申请公布日期 |
2008.07.27 |
申请号 |
RU20070101704 |
申请日期 |
2005.06.06 |
申请人 |
САЖЕМ ДЕФАНС СЕКЮРИТЕ (FR) |
发明人 |
ДОТТА Эмманюэлль (FR);ШАБАНН Эрве (FR);КАРЛЬЕ Венсан (FR) |
分类号 |
H04L9/06 |
主分类号 |
H04L9/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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