Bcrypt Hashes Cannot Be Decrypted; Here Is What to Do Instead

Bcrypt is a one-way hashing function, so a stored hash cannot be reversed to reveal the original password, even with the salt. The only way to recover a password from a bcrypt hash is to guess candidates and compare their hashes, a process bcrypt is intentionally designed to slow down. The article explains that the salt is stored inside the hash and is not a secret, and that its purpose is to make each hash unique. It also notes that online sites claiming to decrypt bcrypt only succeed with weak or common passwords, and warns against uploading real users' hashes to third-party services. For legitimate needs, the article points to checking a candidate password by hashing it and comparing the result.