发明名称 |
MODULAR EXPONENTIATION WITH PARTITIONED AND SCATTERED STORAGE OF MONTGOMERY MULTIPLICATION RESULTS |
摘要 |
<p>Embodiments of techniques and systems for side-channel-protected modular exponentiation are described. In embodiments, during a modular exponentiation calculation, Montgomery Multiplication ("MM") results are produced. These MM results are scattered through a table for storage, such that storage of the values may not lead to discovery of a secret exponent value by a spy process through a side-channel attack. The scattering may be performed in order to reduce a number of per-result memory operations performed during each MM result storage or retrieval. In embodiments, a window size of 4 may be used in the modular exponentiation, along with partitioning of the MM result into 32-bit partition values which are scattered with offsets of 64-bytes. In embodiments, while use of a window size of 4 may result in additional MM calculations during modular exponentiation than other window sizes, the reduction in memory operations may provide a positive performance offset.</p> |
申请公布号 |
WO2013043405(A3) |
申请公布日期 |
2013.06.27 |
申请号 |
WO2012US54503 |
申请日期 |
2012.09.10 |
申请人 |
INTEL CORPORATION;GEURON, SHAY;KRASNOV, VLAD |
发明人 |
GEURON, SHAY;KRASNOV, VLAD |
分类号 |
G06F17/00;G06F9/06;G06F17/10 |
主分类号 |
G06F17/00 |
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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