Abstract
In a time where technologies come and go, when most of the areas of our lives are rely one way or another on electronic devices and the internet, security is a crucial aspect, always needed. Technologies may rise and fall, but the area of security remains necessary at all times. For this reason the research for new algorithms, new and improved methods is constant. Cyber-physical systems are designed as a network of interconnected devices with physical input and output and represent a new direction in the information systems world. In the present paper we present a solution for the security of communication in cyber-physical systems with hierarchical access by combining cryptography and steganography.
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