One of the main functions of the hash function is to securely store the password. It does not store the password directly (that is, it does not store the plaintext password), but rather stores the hash value of the password. During verification, you only need to calculate the hash value of the entered password again and compare it with the hash value of the saved password to know whether the password is correct. Due to the one-way nature of hash functions and the collision constraints, even if an attacker obtains the hash value of a password, it is difficult to know the password itself.
2024-12-24 12:12:10