Our solution solves two fundamental problems of IT-security; authentication and encryption between two nodes. Authentication means verifying that the correct device is connected. Encryption is making the data traffic between two nodes safe. Kelisec’s security method solves the classical dilemma in cryptography and PKI solutions, when sharing keys, it's possible to breach the solution. Our method enables secure mutual authentication and communication without distributing keys. This makes it secure for all known attacks and man-in-the middle attacks.