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SHA-1
An older cryptographic hash function now considered broken and kept only for backward compatibility.
SHA-1 condenses any input into a 160-bit fingerprint. Researchers have demonstrated practical collisions — two different inputs with the same hash — so it can no longer be trusted for security. Systems retain it only where legacy protocols (such as certain older TLS handshakes) still require it, never for new protection.
See also
- SHA-2 / SHA-256A widely trusted family of cryptographic hash functions that turn any data into a fixed-size fingerprint.
- SHA-256/384/512The SHA-2 hash family at three output sizes — 256, 384, or 512 bits — trading speed for a longer fingerprint.
- RSAA classic public-key cryptography system where a public key encrypts or verifies and a separate private key decrypts or signs.