ROTcrypt

A simple ROT-x (Caesar cipher) encryption/decryption tool written in Bash

Screenshots

Usage

$ ./rotcrypt.sh <Rotation number> [Options] <String>

Options

-h    Show the help message
-v    Verbose mode. This parameter can only be combined with the -d parameter
-e    Encrypt a given string
-d    Decrypt a given string

Examples

Decrypting a ROT-10 encrypted text

$ ./rotcrypt.sh 10 -d "drsc sc k cezob dyz combod wocckqo"

Encrypting a text through ROT-8

$ ./rotcrypt.sh 8 -e "This is a super top secret message"

If the ROT argument isn't set, the script will use ROT-13 by default

$ ./rotcrypt.sh -e "This is a super top secret message"

This will decrypt the cypher based on letters' frequency (Works only with English alphabet)

$ ./rotcrypt.sh -d "drsc sc k cezob dyz combod wocckqo"

Using verbose mode

$ ./rotcrypt.sh -d "drsc sc k cezob dyz combod wocckqo" -v