Table of Contents

Keccak Test Vectors

Overview

Keccak is the original hash function family before it was standardized as SHA-3. The key difference is the padding: Keccak uses 0x01 while SHA-3 uses 0x06.

Keccak-256 is primarily used in Ethereum for:

  • Address generation
  • Transaction hashing
  • Merkle tree nodes
  • Smart contract function selectors

Test Vectors

Keccak-256

Empty String

Input Output (Hex)
"" c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470

Standard Test Messages

Input Output (Hex)
"abc" 4e03657aea45a94fc7d47ba826c8d667c0d1e6e33a64a036ec44f58fa12d6c45
"testing" 5f16f4c7f149ac4f9510d9cf8cf384038ad348b3bcdc01915f95de12df9d1b02
"The quick brown fox jumps over the lazy dog" 4d741b6f1eb29cb2a9b9911c82f56fa8d73b04959d3d9d222895df6c0b28aa15

Keccak-384

Empty String

Input Output (Hex)
"" 2c23146a63a29acf99e73b88f8c24eaa7dc60aa771780ccc006afbfa8fe2479b2dd2b21362337441ac12b515911957ff

Standard Test Messages

Input Output (Hex)
"abc" f7df1165f033337be098e7d288ad6a2f74409d7a60b49c36642218de161b1f99f8c681e4afaf31a34db29fb763e3c28e
"The quick brown fox jumps over the lazy dog" 283990fa9d5fb731d786c5bbee94ea4db4910f18c62c03d173fc0a5e494422e8a0b3da7574dae7fa0baf005e504063b3

Keccak-512

Empty String

Input Output (Hex)
"" 0eab42de4c3ceb9235fc91acffe746b29c29a8c366b7c60e4e67c466f36a4304c00fa9caf9d87976ba469bcbe06713b435f091ef2769fb160cdab33d3670680e

Standard Test Messages

Input Output (Hex)
"abc" 18587dc2ea106b9a1563e32b3312421ca164c7f1f07bc922a9c83d77cea3a1e5d0c69910739025372dc14ac9642629379540c17e2a65b19d77aa511a9d00bb96
"The quick brown fox jumps over the lazy dog" d135bb84d0439dbac432247ee573a23ea7d3c9deb2a968eb31d47c4fb45f1ef4422d6c531b5b9bd6f449ebcc449ea94d0a8f05f62130fda612da53c79659f609

Comparison: Keccak vs SHA-3

Input Keccak-256 SHA3-256
"test" 9c22ff5f21f0b81b113e63f7db6da94fedef11b2119b4088b89664fb9a3cb658 36f028580bb02cc8272a9a020f4200e346e276ae664e45ee80745574e2f5ab80

The outputs differ due to different domain separation padding bytes.

References

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