Simple encryption script based on the position of the char relative to a juxtaposed alphabet (that can be shuffled with a given key), then transformed into a letter again. Similar to the Trithemius cipher.
Non alphanumeric characters are not encrypted (except space when using level 2 or 3).
Structure can be preserved or not.
The same algorithm is applied sepparately to numbers if users choses to do so.
This script can be used with a textual interface or through arguments.
Execute the main file with python 3 : python3 ./main.py
python3 main.py [-h] [-e] [-d] [-s {0,1,2,3}] [-k KEY] [-t TEXT]
optional arguments:
-h, --help Show this help message and exit
-e, --encrypt Encrypt a string
-d, --decrypt Decrypt a string
-s {0,1,2,3}, --security {0,1,2,3}
0 - encrypts only the words
1 - level 0 + encrypts numbers
2 - level 1 + word structure randomised
3 - level 2 + shuffles the alphabet
-k KEY, --key KEY Key to use for encryption/decryption
-t TEXT, --text TEXT The text to encrypt/decipher
Encrypting the string Test 123 hello! using level 3 encryption and key = 1234 gives this output : togz95rv7k9sw7q!