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Cryptography & Ciphers

XXTEA Decryption

Apply XXTEA 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 XXTEA 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.

XXTEA Decryption uses XXTEA to process the supplied input. The operation returns transformed variable-length binary data for the selected direction. This record describes decryption or decoding for XXTEA Decryption.

The operation returns transformed variable-length binary data for the selected direction. This record describes decryption or decoding for XXTEA 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.

XXTEA provides legacy byte transformation only; it does not provide authenticated encryption.

Instructions

  1. Provide text or data for this tool.
  2. Use the public hexadecimal byte fixture. This applies to XXTEA Decryption.
  3. Keep key bytes and input length unchanged for reversal. This applies to XXTEA Decryption.
  4. Inspect binary output as Hex rather than readable text. This applies to XXTEA Decryption.

Example

Input: Byte input "0011223344556677" with public key "000102030405060708090a0b0c0d0e0f". Operation direction: decryption or decoding; algorithm: XXTEA Decryption.

Settings: XXTEA Decryption: Input and output: ArrayBuffer or byte array as exposed by the tool. Key: the operation's selected byte encoding. Use at least 8 bytes of input for the variable-length block.

Result: The operation returns transformed variable-length binary data for the selected direction. This record describes decryption or decoding for XXTEA Decryption. Processing runs in the browser for this catalog category, so the result depends on the supplied bytes and settings.

Limits

  • XXTEA Decryption: XXTEA requires a compatible variable-length binary format.
  • XXTEA Decryption: It does not authenticate ciphertext or prove sender identity.
  • XXTEA Decryption: Use a modern authenticated encryption scheme for new designs.

Questions

How is XXTEA different from TEA and XTEA?

XXTEA processes variable-length blocks through its own algorithm. This operation exposes a key but does not expose TEA-style Mode, Padding, or IV controls. Use matching XXTEA inputs and conventions on both sides.

What does the XXTEA key field represent?

The key field represents key bytes in the selected encoding. It does not derive a key from a memorable password. A hexadecimal spelling and literal text of that spelling supply different bytes.

Why is XXTEA output not readable text?

Ciphertext is binary data, so text display can contain nonprinting values. Preserve the complete output in a byte-safe representation for the inverse operation. XXTEA completion does not verify a sender or a message authentication tag.