CompTIA: Advanced Security Practitioner (CASP) Exam Prep

Answer: C -SHA uses a block size of 512 bits.

Key Takeaway: SHA-1 is the most commonly-used function in the SHA family. It is employed in a large variety of popular security applications and protocols including TLS, SSL, PGP, SSH, S/MIME, and IPSec. SHA-1 is considered to be the successor to MD5, an earlier, widely-used hash function. The SHA algorithms were designed by the National Security Agency (NSA) and published as a US government standard.