Mastering and Breaking the Columnar Transposition Cipher 🔓

#cryptology, #cryptography, #cryptanalysis

In this small video, we create and break a columnar transposition cipher with the help of CrypTool 2.

For breaking columnar transposition ciphers, CrypTool 2 contains the "transposition analyzer", which implements different analysis methods, like genetic algorithm, hill-climbing, and brute-force.

You can download CrypTool 2 from: https://www.cryptool.org/en/ct2/downloads

If you are further interested in the background of breaking (long) transposition ciphers, you should have a look at our paper [1] in Cryptologia.

[1] Lasry, George, Nils Kopal, and Arno Wacker. "Cryptanalysis of columnar transposition cipher with long keys." Cryptologia 40.4 (2016): 374-398

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