A tool that generates SHA-1 hashes. Enter a character in the text area and press the calculate button to generate a SHA-1 hash. SHA-1 was designed by The National Security Agency (NSA). It is standardized as FIPS PUB 180-4 by NIST. SHA-1 is a hash function that fixes the weaknesses of SHA-0. SHA-1 is used in many cryptographic applications and protocols. TLS/SSL OpenPGP SSH S/MIME IPsec