Cryptography : CrypTool 2


Hands-on Practice

- CrypTool


What is OS CrypTool?

Well-known e-learning platform for cryptography and cryptanalysis, Open source

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Substitution Cipher Caesar cipher

The action of a Caesar cipher is to move each letter a number of places down the alphabet. This example is with a shift of three, so that a B in the plaintext becomes E in the ciphertext.

ci = E(pi) = pi + 3

Transposition Cipher


One Time Pad