不，他一定是被MD5字典搞糊涂了。

加密哈希(MD5等)是一种方法，您不能仅使用摘要返回原始消息，除非您有关于原始消息的其他不应该的信息等。

理论上，对哈希值进行解密是不可能的，但您可以使用一些肮脏的技术来获取原始的纯文本。

Bruteforcing: All computer security algorithm suffer bruteforcing. Based on this idea today's GPU employ the idea of parallel programming using which it can get back the plain text by massively bruteforcing it using any graphics processor. This tool hashcat does this job. Last time I checked the cuda version of it, I was able to bruteforce a 7 letter long character within six minutes. Internet search: Just copy and paste the hash on Google and see If you can find the corresponding plaintext there. This is not a solution when you are pentesting something but it is definitely worth a try. Some websites maintain the hash for almost all the words in the dictionary.

It is not yet possible to put in a hash of a password into an algorithm and get the password back in plain text because hashing is a one way thing. But what people have done is to generate hashes and store it in a big table so that when you enter a particular hash, it checks the table for the password that matches the hash and returns that password to you. An example of a site that does that is http://www.md5online.org/ . Modern password storage system counters this by using a salting algorithm such that when you enter the same password into a password box during registration different hashes are generated.

不可能，至少在合理的时间内是不可能的。

通常的处理方式是密码“重置”。也就是说，你给他们一个新的(随机的)密码，并在电子邮件中发送给他们。

无法恢复md5密码。(任何语言)

但是你可以:

给用户一个新的。

找个彩虹表，也许能找回旧的。

解密(直接从散列值中获取纯文本，以一种算法方式)，没有。

然而，有一些方法使用所谓的彩虹表。如果你的密码是没有盐的散列，这是非常可行的。