Why are hash functions one way? If I know the algorithm, why …
The hash function is designed so it is hard to reverse it and get any answer at all, even a different password with the same hash. In crypto-speak: a hash function vulnerable to a preimage …
How does hashing work? - Information Security Stack Exchange
Apr 8, 2013 · The hashing function is anything but random. However, randomization is employed to thwart attackers who build large dictionaries of passwords and hashes, that enable them to …
Is there a hash function which has no collisions?
27 Is there a hash function which has no collisions? To clarify: it would be some function which would produce variable-length output, and never produce the same output for differing input. It …
Why can't we reverse hashes? - Cryptography Stack Exchange
Apr 6, 2017 · Why can't we? We can. The algorithm is trivial: try every possible string, ordered by length and then by alphabetical order, until you get one that hashes to the desired value. …
Reversible Hash Function? - Information Security Stack Exchange
Jul 13, 2014 · Is there any reversible hash function? The hash function like SHA and MD5 are not reversible. I would like to know if there exist some reversible hash functions?
Rounds in a hashing function - Information Security Stack Exchange
By executing a round of hashing, the crypt algorithm makes at least a one bit change to the message, resulting in a completely new hash. If the hash algorithm didn't have strong collision …
How to securely hash passwords? - Information Security Stack …
Nov 12, 2010 · Indeed, PBKDF2 and scrypt are KDF, not password hashing function -- and NIST "approves" of PBKDF2 as a KDF, not explicitly as a password hasher (but it is possible, with …
Salted hashes vs HMAC? - Information Security Stack Exchange
Most of discussions involving access credentials include references to "hashing salted passwords". Is this another way to referring to the HMAC algorithm or a totally different …
How does a hashing function always return the same length hash?
As of how a hash function manages to produce constant length output algorithmically: most modern hash functions operate block-wise on their input, padding the final block as necessary.
How do databases/companies change their hashing algorithm?
May 6, 2024 · Similar question where asked here multiple times already. See Hash function change, How to upgrade the hashing method of a live database without compromising …