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TupleHash

TupleHash is the Keccak hash for tuples of byte strings defined in NIST SP 800-185, ensuring that different tuple structures do not collide.

Purpose

Provides unambiguous hashing for tuples of variable-length fields, avoiding delimiter-injection collisions — suited to structured record digests.

Mechanism

Each field is encoded as right_encode(length) || field content and concatenated, with a final cSHAKE output. The length-prefix encoding ensures (ab, c) and (a, bc) produce different inputs.

Use cases

  • Structured record hashing
  • Database row digests
  • Unambiguous tuple encoding

Related tools

SHA-3 / Keccak Hash
Compute SHA-3 (224/256/384/512) and Keccak-256 hashes. Free, private, and 100% client-side.
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Hash Calculator
Compute MD5, SHA-1, SHA-256, or SHA-512 hashes with hex or Base64 output. Free, private, and 100% client-side.
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References