Auguste Kerckhoffs postulated his eponymous principle back in the 19th century: "A cryptosystem should be secure even if everything about the system, except for the key, is public knowledge". This means that an effective method does not have to be kept secret. If it were, you should wonder why. This video describes a new method of software encryption, called Blurry Box, based on Kerckoffs principle, developed in a collaborative research effort between the Karlsruhe Institute of Technology (KIT), the FZI Research Center, and Wibu-Systems. Blurry Box cryptography uses seven published methods that greatly increase the complexity and time required for an attack to be successful. In the end, it would be easier and less expensive for the would-be attacker to develop similar software from scratch. Blurry Box cryptography can be combined with the anti-debug and obfuscation methods typical of Wibu-Systems' CodeMeter Protection Suite. With Blurry Box, software protection becomes measurable and comparable. No blind faith needed.