Many websites can be decrypted, but it shouldn't be decrypted. It should be called library collision.

The website database needs to calculate or store a large number of MD5 values of text encryption.

When the user enters the MD5 value, the website will go to the database to find the source text corresponding to the MD5 value. This principle ~

But MD5 is irreversible after all, and it can't decrypt some big data texts, so the website will prompt that decryption failed.

Some simple combinations of English numerical punctuation marks are still possible.