soutzis / cryptanalysis-helper Goto Github PK

Substitution cipher features need to be added (encryption, decryption, automatic key guessing).

Capabilities to encrypt some message need to be added, for example in the Columnar Transposition cipher mode.

If a substitution is made during frequency analysis, for example A->G, all the characters 'A', will be substituted with 'g' in the cipher text.
When deciding to change the substitution to something like A->K, the key will be updated, but the current cipher text (the one showing the progress) will not be updated.

This can lead the analyst to the wrong conclusion/decisions.

When brute-forcing keys to automatically crack the cipher, operations become too slow, especially when decrypting a columnar transposition cipher.

The process needs to be implemented concurrently, to speed up the application significantly.

There is no user option to save the progress when performing Frequency Analysis. This would help analysts to stop/continue working whenever they want to.

There should be a verbosity option for generating reports and storing them on disk.

Currently, the application only supports the 128 ASCII characters. If a stream cipher contains cipher symbols that are not part of the standard ASCII table, decrypting Stream Ciphers will not work. It uses the primitive char to convert integers/bytes into characters and the maximum value is 0xFFFF.