About SHA-256 hash function
The gold standard of hashing
SHA-256 is the foundation of modern internet security. Every time you see a lock in your browser address bar, SHA-256 is behind it in the site TLS certificate.
SHA-256 in Bitcoin
Bitcoin uses double SHA-256 hashing for mining and address creation. Miners compete to compute hashes with a certain number of leading zeros.
Software verification
Developers publish SHA-256 hashes for ISO images and archives. Compare the hash of the downloaded file with the original β if they match, the file is authentic and not corrupted.