On Corrective Patterns for the SHA-2 Family.
Philip Hawkes, Michael Paddon, Gregory G. Rose · 2004
The Secure Hash Standard (SHS) [3] includes hashing algorithms denoted SHA-n, n 224, 256, 384, 512 for producing message digests of length n. These algorithms are based on a common design, sometimes known as SHA-2, that consists of a message schedule and a register.