Setup for Cracking NSA Ciphertext - simple substitution with Python
This video shows detail of how to setup Python script to crack substation ciphers. It relates to an earlier video showing how the script was used to crack NSA tweet:
• Cracking NSA Ciphertext - simple substitut...
The Python script:
http://practicalcryptography.com/cryp...
Pycipher module installation for Python:
http://www.practicalcryptography.com/...
Github module:
https://github.com/jameslyons/pycipher
Additional files including language statistics:
http://practicalcryptography.com/cryp...
Selected commands:
502 mkdir cipher
503 cd cipher/
504 ls
505 vi break_affine.py
506 mv ../Downloads/english_quadgrams.txt.zip .
507 unzip english_quadgrams.txt.zip
508 ls
509 vi english_quadgrams.txt
511 mv english_quadgrams.txt quadgrams.txt
512 python break_affine.py
513 sudo su -
514 cd pycipher-0.5.0
515 python setup.py install
by Szymon Machajewski