About Twofish Decryption Tool
Twofish is a symmetric key block cipher designed by Bruce Schneier. It was one of the five AES finalists. Twofish operates on 128-bit blocks and supports key sizes of 128, 192, or 256 bits with 16 rounds of a Feistel network. When using CBC or ECB mode, the PKCS#7 padding scheme is used.
Input: text. Output: text.
Format reference: Twofish Decrypt background and specification
Example
Use “Try example” to load this public sample and its settings, then run it.
Settings used in this example
| Parameter | Example value | Input and choices |
|---|---|---|
| Key | {"string":"00000000000000000000000000000000","option":"Hex"} | Key/text encoding: Hex, UTF8, Latin1, Base64 |
| IV | {"string":"","option":"Hex"} | Key/text encoding: Hex, UTF8, Latin1, Base64 |
| Mode | ECB | CBC, CFB, OFB, CTR, ECB |
| Input | Hex | Hex, Raw |
| Output | Hex | Raw, Hex |
| Padding | NO | PKCS5, NO, ZERO, RANDOM, BIT |
Sample keys and passwords are public. Never use them to protect real data.
Input
9f589f5cf6122c32b6bfec2f2ae8c35a
Result
00000000000000000000000000000000
Parameters
| Parameter | Default value | Input and choices |
|---|---|---|
| Key | {"option":"Hex","string":""} | Key/text encoding: Hex, UTF8, Latin1, Base64 |
| IV | {"option":"Hex","string":""} | Key/text encoding: Hex, UTF8, Latin1, Base64 |
| Mode | CBC | CBC, CFB, OFB, CTR, ECB |
| Input | Hex | Hex, Raw |
| Output | Raw | Raw, Hex |
| Padding | PKCS5 | PKCS5, NO, ZERO, RANDOM, BIT |
Before interpreting the result
Use the exact key encoding, mode, padding and IV expected by the source system. Historical ciphers are useful for learning and analysis. Encoding alone provides no confidentiality.
How to use this page
- Paste your input or open a local file.
- Adjust tool options if needed, then choose Run tool.
- Copy the result or download the original output bytes.
Inputs and results are not added to the public catalogue or saved in the URL. Processing happens in your browser; HTTP Request and DNS over HTTPS send the requests you explicitly run. Files up to 128 MiB can be opened; decompression and image tools may have smaller processing limits. Large results have a shortened preview. Text and HTML downloads use UTF-8; binary downloads preserve output bytes. Pasted text follows browser newline handling; open a file when exact input bytes matter.