Caesar Cipher

Encrypt and decrypt using caesar cipher. Decryption using brute force available.

Encrypt

./caesar encrypt|e <filename> <key>

Decrypt

With key

./caesar decrypt|d <filename> <key>

Without key

./caesar decrypt|d <filename>

Examples

Encrypt input.txt with a key (right-shift) of 18

./caesar e input.txt 18

Decrypt input.txt with a key of 2 (right-shift of 24)

./caesar d input.txt 2

Decrypt input.txt without knowing key (provides best guess)

caesar d input.txt