如何反转SHA1加密文本 [英] How to reverse SHA1 Encrypted text

问题描述

我需要将SHA1加密文本反向翻译为纯文本。

I have a requirement to reverse translate a SHA1 encrypted text to plain text.

我需要Java代码。

很多论坛说，它不能做，但我发现了一个链接 http：/ /www.stringfunction.com/sha1-decrypter.html 这样做完全一样。我已经测试过了。现在我需要用Java实现的算法。

many forums say that it cant be done but i have found a link http://www.stringfunction.com/sha1-decrypter.html which does exactly the same. I have tested it. Now i need the algorithm to implement in Java.

请帮助!!!

推荐答案

这是不可能的。 SHA1像所有加密摘要算法一样，不是加密算法，而是散列算法。它需要任何文本，只要你想要，并将其转换成几个字节，在一种不可能恢复，按设计。加密散列的整个点是单向的，因此不可能恢复。如果可能，算法将是无用的。

It's plain impossible. SHA1, like all cryptographic digest algorithms, is not an encryption algorithm, but a hashing algorithm. It takes any text, as long as you want, and transforms it into a few bytes, in a way that is impossible to revert, by design. The whole point of a cryptographic hash is to be one-way, and thus impossible to revert. If it was possible, the algorithm would be useless.

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