SHA-2
SHA-2 (Secure Hash Algorithm 2) is a family of cryptographic hash functions designed by the NSA and published by NIST in 2001. It generates fixed-size hash values (e.g., 256-bit for SHA-256) from input data of any size, providing data integrity verification and digital signature support. SHA-2 is widely used in security protocols like TLS/SSL, cryptocurrencies (e.g., Bitcoin), and password hashing.
Developers should learn SHA-2 when implementing security features such as data integrity checks, digital signatures, or blockchain technology, as it offers strong collision resistance and is considered secure against known attacks. It is essential for applications requiring cryptographic hashing, including secure communication protocols, file verification, and password storage (when combined with salting).