rknock ====== This project is a challenge-response port knocking and SPA system that I wrote for my MSc in 2007. It worked at the time. It should compile under a modern compiler as of 2016, but it has not been tested and may not work. I'm not sure that I remember how to use it. It has various issues that need to be addressed before anyone should try to use it. The design of this program is described in http://ciphertext.info/papers/thesis-degraaf.pdf Unless otherwise noted, all code here is currently not licenced for any re-use or distribution. It is being made available for educational purposes only.