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Update last question.
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Youggls committed Dec 20, 2021
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Expand Up @@ -1299,5 +1299,5 @@ RSA 陷门置换有两个常用的硬核谓词:求最高位比特函数 $msb(x
&= 2 * Sign_{sk}(1)
\end{align}
$$
因此,该方案不安全。
这样,我们通过询问 $m_x$ 的签名,可以得到 $m=1$ 时的数字签名 $Sign_{sk}=1/2Sign_{sk}(m_x)$ 因此,该方案不安全。

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