SHA-256 is a cryptographic hash function developed by the NSA in 2001 that converts any input into a fixed 256-bit output, serving as the foundation of Bitcoin’s proof-of-work consensus mechanism.

Many organizations have been replacing the MD5 hash algorithm with the SHA-1 hash function, but can the MD5 hash algorithm still be used securely? MD5 (Message-Digest algorithm 5) is a cryptographic ...