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Tool Factory

Cryptography & Ciphers

RC6 Decryption

Apply RC6 Decrypt with explicit key, format, and algorithm settings. Enter the data and key material, choose the parameters, then review the result.

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Apply RC6 Decrypt with explicit key, format, and algorithm settings. Enter the data and key material, choose the parameters, then review the result.

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

RC6 Decryption uses RC6 to process the supplied input. The operation returns the selected legacy cipher output or recovered plaintext. This record describes decryption or decoding for RC6 Decryption.

The operation returns the selected legacy cipher output or recovered plaintext. This record describes decryption or decoding for RC6 Decryption. Processing runs in the browser for this catalog category, so the result depends on the supplied bytes and settings. Processing runs in the browser.

These operations support legacy or educational compatibility; they do not provide modern key management or authenticated trust.

Instructions

  1. Provide text or data for this tool.
  2. Use a public test key and short message. This applies to RC6 Decryption.
  3. Copy every mode and padding setting into the paired direction. This applies to RC6 Decryption.
  4. Compare Hex output with the reference fixture before using a result. This applies to RC6 Decryption.

Example

Input: Plaintext "Test message" with a public compatibility key "0011223344556677" and the operation defaults. Operation direction: decryption or decoding; algorithm: RC6 Decryption.

Settings: RC6 Decryption: Select the operation's key encoding and algorithm options. Use the listed mode, IV, padding, input encoding, and output encoding. Use Hex output for reproducible binary fixtures.

Result: The operation returns the selected legacy cipher output or recovered plaintext. This record describes decryption or decoding for RC6 Decryption. Processing runs in the browser for this catalog category, so the result depends on the supplied bytes and settings.

Limits

  • RC6 Decryption: Legacy cipher variants need exact parameters for interoperability.
  • RC6 Decryption: Unauthenticated modes do not detect ciphertext changes.
  • RC6 Decryption: Do not use these operations as a new application security design.

Questions

Which key settings does RC6 decrypt require?

Match Key, Word Size, and Rounds with the source implementation. The IV size depends on the selected word size.

Why does RC6 output differ from another tool?

Mode and Padding also affect the result. Changing Word Size creates a different RC6 parameterization even when the key remains unchanged.

How should I copy RC6 decrypt input and output?

Select the actual Input representation before running the operation. Choose Hex output when you need to preserve arbitrary bytes during copying. A readable result or a Complete label alone does not verify the message or its sender.