[Description] Abstract Class extended by a single Concrete class Used to implement SHA-256 hashing algorithm Part of SHA hashing algorithm version 2 variants Implement a 256-bit hashing key [Classes] 
SHA256
M D 5
S H A 1
K e y e d H a s h A l g o r i t h m
R I P E M D 1 6 0
S H A 2 5 6
S H A 3 8 4
S H A 5 1 2