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Hashing & Checksums

MD4 Digest Calculator

Calculate or verify a digest with MD4. Enter the data, choose the digest options, then copy the calculated value.

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Add the required input to continue.

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Calculate or verify a digest with MD4. 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.

MD4 Digest Calculator uses MD4 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 MD4 Digest Calculator.

The operation returns a deterministic digest for the supplied input and selected settings. The digest or checksum format is specific to MD4 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 MD4 Digest Calculator.
  3. Record every size, round, variant, or seed setting beside the digest. This applies to MD4 Digest Calculator.
  4. Change one input byte to verify that the result changes as expected. This applies to MD4 Digest Calculator.

Example

Input: Short public bytes "Test message". Algorithm operation: MD4 Digest Calculator.

Settings: MD4 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 MD4 Digest Calculator.

Limits

  • MD4 Digest Calculator: This algorithm has known security weaknesses and should not protect new secrets.
  • MD4 Digest Calculator: Digest equality depends on exact bytes, encoding, and settings.
  • MD4 Digest Calculator: A digest alone does not authenticate its source.

Questions

What input does MD4 Digest Calculator accept?

MD4 Digest Calculator accepts binary data or a selected file.

Does MD4 Digest Calculator need extra settings?

MD4 Digest Calculator does not define extra operation settings. It uses its built-in behavior with the supplied input.

What does MD4 Digest Calculator return?

MD4 Digest Calculator returns text. The MD4 (Message-Digest 4) algorithm is a cryptographic hash function developed by Ronald Rivest in 1990. The digest length is 128 bits. The algorithm has influenced later designs, such as the MD5, SHA-1 and RIPEMD algorithms. The security of MD4 has been severely compromised.