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Implementation of CipherSaber 1 & 2 ( http://ciphersaber.gurus.org/ )

Usage:

athame [-e | -d] [-r num] [-k key] [-o file] file

Options:

-e Encrypt mode (default)
-d Decrypt mode
-r Number of rounds when permutate. Default is 20, set this to 1 to use CipherSaber-1
-k Key used to encrypt/decrypt. It will be prompted if this is ommited
-o Output file. It uses standard output by default