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My question is simple: encryption hides information to the point where only the people intended to see the information can actually see it. You can encrypt information and then decrypt it. Why is hashing is considered encryption if it cannot be decrypted?
I say hashing is considered encryption because you call MD5 a cryptographic hash function.
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Hash functions are commonly used data structures in computing systems for tasks, such as checking the integrity of messages and authenticating information. While they are considered cryptographically "weak" because they can be solved in polynomial time, they are not easily decipherable.
Hashing vs EncryptionHashing and encryption both provide ways to keep sensitive data safe. However, in almost all circumstances, passwords should be hashed, NOT encrypted. Hashing is a one-way function (i.e., it is impossible to "decrypt" a hash and obtain the original plaintext value).
A cryptographic hash function is an algorithm that takes an arbitrary amount of data input—a credential—and produces a fixed-size output of enciphered text called a hash value, or just “hash.” That enciphered text can then be stored instead of the password itself, and later used to verify the user.
Correct, Hashing is a one way function, but Hashing isn't considered Encryption. A good explanation of the difference Hashing vs Encryption and Fundamental difference between Hashing and Encryption algorithms.
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