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[程序员] 从理论上说，对一个文件 用两个不同 512bytes 公开 salt 计算 SHA256 然后拼接 / 用一个公开 512bytes salt 计算 SHA512 二者得到的 hash 都是 64bytes，哪个结果进行碰撞攻击的难度更大？

发表于
碰撞攻击指的是构造两个内容不同但 hash 相同的文件。
原文件的大小可能是 1KiB / 1MiB / 1GiB / 1TiB 。是否要分情况讨论？

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