Elliptic curve cryptography (ECC) is used in many security systems due to its small key size and high security as compared to the other cryptosystems. In many well-known security systems substitution box (S-box) is the only non-linear component. Recently, it is shown that the security of a cryptosystem can be improved by using dynamic S-boxes instead of a static S-box. This fact necessitates the construction of new secure S-boxes. In this paper, we propose an efficient method for the generation of S-boxes based on a class of Mordell elliptic curves (MECs) over prime fields by defining different total orders. The proposed scheme is developed in such a way that for each input it outputs an S-box in linear time and constant space. Due to this property, our method takes less time and space as compared to all existing S-box construction methods over elliptic curve. Furthermore, it is shown by the computational results that the proposed method is capable of generating cryptographically strong S-boxes with comparable security to some of the existing S-boxes constructed over different mathematical structures.
Due to extensive utilization of fossil fuels, the energy demand of the growing population of the world is increasing day by day. The utilization of these fossil fuels also results in environmental pollution and energy crisis around the globe. As such, scientists and academics are trying to develop green materials which tend to reduce the impact of human on environment. Starch is the most abundant organic compound found in nature after cellulose. Thus, starch is an attractive natural green material candidate for researchers to replace the petro‐chemical‐based ingredients in wood composite products. There is an increasing demand for the wood adhesives in the recent years due to increasing applications of wood products. The wood adhesive industry remains dependent on the petroleum resources due to attributes such as high performance and low cost. However, these adhesives can create serious risks to human health and spoil the indoor air quality by emitting these carcinogenic compounds into the environment. Therefore, there is a growing interest to replace the petro‐chemical based ingredients in the adhesive formulation with green renewable material. This review focuses on research conducted in the recent past to develop adhesive for wood application from green renewable material such as starch.
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