发明名称 |
Integer Division In A Manner That Counters A Power Analysis Attack |
摘要 |
In the course of performing an Elliptic Curve Scalar Multiplication operation by Additive Splitting Using Division, a main loop of an integer division operation may be performed. The integer division has a dividend and a divisor. By storing both the divisor and the negative value of the divisor, susceptibility to a Simple Power Analysis Side Channel attack is minimized. A carry bit from a previous iteration of the main loop determines which of the divisor or the negative of the divisor to use. The order of an addition operation and a shift left operations in the main loop is interchanged compared to a known integer division method and there are no negation operations in the main loop.
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申请公布号 |
US2008275932(A1) |
申请公布日期 |
2008.11.06 |
申请号 |
US20080040231 |
申请日期 |
2008.02.29 |
申请人 |
RESEARCH IN MOTION LIMITED |
发明人 |
EBEID NEVINE MAURICE NASSIF |
分类号 |
G06F7/523 |
主分类号 |
G06F7/523 |
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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