What Makes a Secure Hash

A “secure” hash is a hash that is believed to be difficult to “spoof” in a formulaic, reproducible way without prior knowledge of the message used to create the hash. As that information is generally secret, hence the need for a hash, this is a good property of a hashing function intended for use in authentication.

What is a hash function in cyber security?

Hash functions are extremely useful and appear in almost all information security applications. A hash function is a mathematical function that converts a numerical input value into another compressed numerical value. The input to the hash function is of arbitrary length but output is always of fixed length.

What is a hash password?

When a password has been “hashed” it means it has been turned into a scrambled representation of itself. A user’s password is taken and – using a key known to the site – the hash value is derived from the combination of both the password and the key, using a set algorithm.