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Hashing & Checksums

Snefru Digest Calculator

Calculate or verify a digest with Snefru. Enter the data, choose the digest options, then copy the calculated value.

Tool workspace

Your input stays in this browser.

Add the required input to continue.

Needs input

You can run the tool again after any change.

Options

Your result appears here

Calculate or verify a digest with Snefru. Enter the data, choose the digest options, then copy the calculated value.

This tool runs open-source code from CyberChef by GCHQ (Apache License 2.0). See open-source credits.

Snefru Digest Calculator uses Snefru for the supplied input. The operation returns a deterministic digest for the supplied input and selected settings. The digest or checksum format is specific to Snefru Digest Calculator.

The operation returns a deterministic digest for the supplied input and selected settings. The digest or checksum format is specific to Snefru Digest Calculator. This result runs in the browser for this catalog category. Processing runs in the browser.

This legacy digest supports compatibility checks; it does not provide a safe modern security boundary.

Instructions

  1. Provide text or data for this tool.
  2. Use a short public fixture. This applies to Snefru Digest Calculator.
  3. Record every size, round, variant, or seed setting beside the digest. This applies to Snefru Digest Calculator.
  4. Change one input byte to verify that the result changes as expected. This applies to Snefru Digest Calculator.

Example

Input: Short public bytes "Test message". Algorithm operation: Snefru Digest Calculator.

Settings: Snefru Digest Calculator: Use the operation's documented input encoding. Select digest size, rounds, variant, seed, or output encoding when shown. Keep byte order and formatting unchanged when comparing outputs.

Result: The operation returns a deterministic digest for the supplied input and selected settings. The digest or checksum format is specific to Snefru Digest Calculator.

Limits

  • Snefru Digest Calculator: This algorithm has known security weaknesses and should not protect new secrets.
  • Snefru Digest Calculator: Digest equality depends on exact bytes, encoding, and settings.
  • Snefru Digest Calculator: A digest alone does not authenticate its source.

Questions

What input does Snefru Digest Calculator accept?

Snefru Digest Calculator accepts binary data or a selected file.

Which settings does Snefru Digest Calculator provide?

Snefru Digest Calculator provides controls for Size, Rounds.

What does Snefru Digest Calculator return?

Snefru Digest Calculator returns text. Snefru is a cryptographic hash function invented by Ralph Merkle in 1990 while working at Xerox PARC. The function supports 128-bit and 256-bit output. It was named after the Egyptian Pharaoh Sneferu, continuing the tradition of the Khufu and Khafre block ciphers. The original design of Snefru was shown to be insecure by Eli Biham and Adi Shamir who were able to use differential cryptanalysis to find hash collisions. The design was then modified by increasing the number of iterations of the main pass of the algorithm from two to eight.