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SHA-512

SHA-512 is the 512-bit-output member of the SHA-2 family; faster than SHA-256 on 64-bit platforms, providing a higher security margin.

Purpose

Provides a 512-bit secure hash for high-security needs and 64-bit-optimized scenarios.

Mechanism

Processes input in 1024-bit blocks, maintaining a 512-bit state (eight 64-bit words). Each block goes through 80 steps of nonlinear transforms updating the state. Outputs a 512-bit digest. Efficient on 64-bit platforms due to word-length match.

Use cases

  • High-security digital signatures
  • PGP/GPG key fingerprints
  • Crypto library internals
  • Blockchains (some)

Examples

  • Input 
    hello
    Output 
    9b71d224bd62f3785d4d2262f6d2c3c2...

    512 bits = 128 hex characters

Common errors

Assuming a longer output is always more secure
256 bits suffice; choose per need

Related terms

SHA-256
SHA-256 is the 256-bit-output member of the SHA-2 family, widely used in TLS, blockchains, and cryptographic applications, with no known practical attacks.
GLOSSARY
SHA-3 (Keccak)
SHA-3 is the hash standard based on the Keccak sponge construction; structurally entirely different from SHA-2, it serves as a fallback in case SHA-2 is broken.
GLOSSARY
BLAKE2
BLAKE2 is a hash function designed by Jean-Philippe Aumasson et al.; faster than MD5 with security comparable to SHA-3, a high-performance alternative to SHA-2/3.
GLOSSARY

Related tools

Hash Calculator
Compute MD5, SHA-1, SHA-256, or SHA-512 hashes with hex or Base64 output. Free, private, and 100% client-side.
TOOL
Hash Compare
Compare MD5, SHA-1, SHA-256, SHA-384, SHA-512 of the same input. Free, private, 100% client-side.
TOOL

References