SHA-2 is a hash function created in 2001.
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SHA-2 (Secure Hash Algorithm 2) is a set of cryptographic hash functions designed by the United States National Security Agency (NSA). They are built using the Merkle鈥揇amg氓rd structure, from a one-way compression function itself built using the Davies鈥揗eyer structure from a (classified) specialized block cipher. SHA-2 includes significant changes from its predecessor, SHA-1. Read more on Wikipedia...