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Classical Ciphers

Caesar Cipher
ROT13
Vigenère Cipher
Atbash Cipher
Playfair Cipher
Rail Fence Cipher

Symmetric Ciphers

Hash Functions

Asymmetric Ciphers

Workspace

Crypto Workspace

Compare Algorithms Benchmark Performance Start Challenge

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Classical Ciphers

Caesar Cipher
ROT13
Vigenère Cipher
Atbash Cipher
Playfair Cipher
Rail Fence Cipher

Symmetric Ciphers

Hash Functions

Asymmetric Ciphers

Workspace

Twofish

Compare Algorithms Benchmark Performance Start Challenge

Twofish

AES finalist by Bruce Schneier et al. (1998). 128-bit block, 128/192/256-bit keys, 16-round Feistel. Uses key-dependent S-boxes (derived via RS matrix over GF(2^8)), MDS matrix diffusion, PHT, and 40 subkeys. Used in GnuPG and VeraCrypt. Never broken.

●Securesymmetric

Plaintext / Input Message

Cryptographic Key / Shift

Auto Compute

Workspace Presets

Save and restore visualizer settings in this browser.

Preset nameSave key with preset — disabled by default. Stored keys remain readable to anyone with access to this browser profile.

Saved presets for this cipher

Output ResultLocally Derived

No output yet

Imported traces are validated and replayed locally. They never run a cipher operation automatically.

Recommended Next Step

Continue your cryptography learning path

A simple stream cipher performing byte-wise XOR operations between plaintext and key.

🔐One-Time Pad (OTP)

An unbreakable cipher when used with a truly random, single-use key of equal length to the plaintext.

Data Encryption Standard. A legacy 64-bit block cipher utilizing a 56-bit key size.

Related Resources

📄 Docs & Theory 🎯 Challenge Mode 🧭 Cipher Advisor ⚖️ Compare Ciphers