Hashing & Checksums
Luhn Checksum Digest Calculator
Calculate or verify a digest with Luhn Checksum. 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.
Luhn Checksum Digest Calculator uses Luhn for the supplied input. The operation returns a checksum or check bit for the supplied input and settings. The digest or checksum format is specific to Luhn Checksum Digest Calculator.
The operation returns a checksum or check bit for the supplied input and settings. The digest or checksum format is specific to Luhn Checksum Digest Calculator. This result runs in the browser for this catalog category. Processing runs in the browser.
Checksums detect selected transmission or entry errors; they do not provide confidentiality or adversarial integrity.
Instructions
- Provide text or data for this tool.
- Use a short public fixture first. This applies to Luhn Checksum Digest Calculator.
- Record algorithm width and byte ordering with the result. This applies to Luhn Checksum Digest Calculator.
- Change one input byte to confirm the expected error-detection behavior. This applies to Luhn Checksum Digest Calculator.
Example
Input: Short public bytes "Test message". Algorithm operation: Luhn Checksum Digest Calculator.
Settings: Luhn Checksum Digest Calculator: Use the input type required by the operation. Select the documented algorithm, width, mode, block size, or delimiter. Use the text or Hex output format expected by the receiving system.
Result: The operation returns a checksum or check bit for the supplied input and settings. The digest or checksum format is specific to Luhn Checksum Digest Calculator.
Limits
- Luhn Checksum Digest Calculator: A checksum is not a cryptographic signature.
- Luhn Checksum Digest Calculator: It can miss deliberate changes or collisions.
- Luhn Checksum Digest Calculator: Interoperability depends on width, polynomial, byte order, and formatting settings.