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Cryptography & Ciphers

DES Decryption

Apply DES 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 DES 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.

DES Decryption uses DES to process the supplied input. The operation returns block-cipher ciphertext or plaintext as Text or Hex. This record describes decryption or decoding for DES Decryption.

The operation returns block-cipher ciphertext or plaintext as Text or Hex. This record describes decryption or decoding for DES 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.

DES-family operations provide legacy byte transformation only; they are not a modern authenticated encryption design.

Instructions

  1. Provide text or data for this tool.
  2. Use a public fixture and keep the mode consistent for encryption and decryption. This applies to DES Decryption.
  3. Select Hex for exact byte comparison. This applies to DES Decryption.
  4. Check padding and IV values when decryption fails. This applies to DES Decryption.

Example

Input: Plaintext "Test message"; key "0011223344556677"; IV "0102030405060708". Operation direction: decryption or decoding; algorithm: DES Decryption.

Settings: DES Decryption: Select the required key encoding, mode, input encoding, and output encoding. Use an 8-byte IV for non-ECB modes. Triple DES accepts 16- or 24-byte keys; DES uses its operation-defined key size.

Result: The operation returns block-cipher ciphertext or plaintext as Text or Hex. This record describes decryption or decoding for DES Decryption. Processing runs in the browser for this catalog category, so the result depends on the supplied bytes and settings.

Limits

  • DES Decryption: ECB reveals repeated blocks.
  • DES Decryption: DES and Triple DES are legacy algorithms for compatibility work.
  • DES Decryption: These operations do not authenticate ciphertext or establish sender identity.

Questions

Which key settings does DES decrypt require?

Supply the DES key in the selected encoding and match the IV for the chosen mode. Hexadecimal key text represents bytes rather than a password.

Why does DES output differ from another tool?

Match the source mode and padding convention. DES compatibility does not make this a suitable design for protecting new sensitive data.

How should I copy DES 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.