TripleSec seems to be only about the same person who did the encrypting, doing the decrypting -- for securing your own stuff, not really for communication. Communication requires exchanging keys beforehand...
[Edit: meant encrypting not encoding... thanks Perseids]
I may be a bit pedantic, but please don't use "encode" when you mean "encrypt". These words describe two quite different concepts and guarantees. Exchanging them the other way around produces catastrophic results like "Of course we encrypt our passwords, we use the renowned base64".
[Edit: meant encrypting not encoding... thanks Perseids]