发明名称 |
METHOD AND APPARATUS FOR MINIMIZING DIFFERENTIAL POWER ATTACKS ON PROCESSORS |
摘要 |
A method of masking a conditional jump operation in a cryptographic processor, wherein program execution jumps to one of two branches dependent on a first or second condition of a distinguishing value V relative to a reference wherein the reference is bounded by an upper limit Vmax and a lower limit Vmin. The method comprising the steps of determining the location of a conditional jump and inserting code thereat for executing instructions to change program execution to a respective one of the two branches by using said distinguishing value and a base address to compute a target address, wherein for each evaluation of said condition a different number of instructions are executed, thereby minimizing the effectiveness of a differential power attack. |
申请公布号 |
CA2258338(A1) |
申请公布日期 |
2000.07.11 |
申请号 |
CA19992258338 |
申请日期 |
1999.01.11 |
申请人 |
CERTICOM CORP. |
发明人 |
LAMBERT, ROBERT J.;PEZESHKI, FARHAD |
分类号 |
G09C1/00;G06F21/00;G06K19/073;(IPC1-7):G06F9/30;G06F12/14 |
主分类号 |
G09C1/00 |
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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