Hardware Efficient Parallel Substitution Box for Block Ciphers with Static and Dynamic Properties

Security aspects in communication systems are becoming more and more significant day by day. New methods for improved security are to be introduced since the security attacks also forms new shapes and expressions. Generally the security of a hardware system is directly proportional to the hardware complexity. It is a challenge to enhance or at least maintain the security level with reduced hardware complexity. In this paper an attempt is made to design a part of secure communication system, diverting from the conventional methods. This paper focus on hardware efficient design of Substitution Box (S Box), as S Box is the most significant part of a block cipher. The proposed design incorporates the concept of both static and dynamic S Boxes.