A handy tool to encrypt a file by swqpping the nibbles of every byte in a file
Usage:
$ ./swap source dst
The nibbles of every byte contained in source are swapped and the result is stored in the dst. Example,
./swap example.txt encrypted.txt
./swap encrypted.txt example_2.txt
After executing the commands shown above, example.txt and example_2.txt would be exactly the same. Happy encrypting :)