note 116389 deleted from function.hash by salathe

Note Submitter: imran dot eycon at gmail dot com ---- SH2 encryption is more secure encryption yet as md5 and SH1 are attacked , according to wiki pedia SHA-2 is a set of cryptographic hash functions designed by the NSA (U.S. National Security Agency). SHA stands for Secure Hash Algorithm. Cryptographic hash functions are mathematical operations run on digital data; by comparing the computed "hash" (the execution of the algorithm) to a known and expected hash value, a person can determine the data's integrity. For example, computing the hash of a downloaded file and comparing the result to a previously published hash result can show whether the download has been modified or tampered with. A key aspect of cryptographic hash functions is their one-way nature: given a computed hash value, it is very difficult to derive the original data. In php it is used as $hash = hash('sha256', $pass); - creates 256 bit hash. $hash = hash('sha512', $pass); - creates 512 bit hash. etc