How to hash an MD5 string?

Question

Hashing

Hello! How can MD5 be hashed? I read on the boards that it’s impossible, but on what basis do online services work then?

Answer 1

online services do not decode MD5, but use "rainbow" tables of huge volumes, which contain hashes from brute-lists, then hashes from hashes with a certain recursion depth are calculated from these hashes, and the last value is written to the database.
In fact, this is an attempt to search for collisions.
That is, the online service theoretically decodes the hash, provided that either a collision was found, or the hashed string has already passed through this service and has been compromised.
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