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Updated SM2 MFMM (2) (markdown)

Sun Yimin 2024-02-22 08:43:32 +08:00
parent 85a08d0872
commit a3d2481bf1
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SM2-MFMM-(2).md

@ -8,7 +8,7 @@ $$P = 2^{256}-(2^{32} \ast 2^{192} + 0 \ast 2^{128} + (2^{32} - 1) \ast 2^{64} +
## 平方的模约减优化 ## 平方的模约减优化
### 方案一 ### 方案一：(移位、加法、减法)
假设： 假设：
$T=t_7 \ast 2^{448} + t_6 \ast 2^{384} + t_5 \ast 2^{320} + t_4 \ast 2^{256} + t_3 \ast 2^{192} + t_2 \ast 2^{128} + t_1 \ast 2^{64} + t_0 $ $T=t_7 \ast 2^{448} + t_6 \ast 2^{384} + t_5 \ast 2^{320} + t_4 \ast 2^{256} + t_3 \ast 2^{192} + t_2 \ast 2^{128} + t_1 \ast 2^{64} + t_0 $
则共四次约减，第一次约减为： 则共四次约减，第一次约减为：