Modification of Traditional RSA into Symmetric-RSA Cryptosystems

Modification of Traditional RSA into Symmetric-RSA Cryptosystems

Prerna Mohit (Indian Institute of Technology (Indian School of Mines), Dhanbad, India) and G. P. Biswas (Indian Institute of Technology (Indian School of Mines), Dhanbad, India)
DOI: 10.4018/IJBDCN.2017010106
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Abstract

This paper addresses the modification of RSA cryptography namely Symmetric-RSA, which seem to be equally useful for different cryptographic applications such as encryption, digital signature, etc. In order to design Symmetric-RSA, two prime numbers are negotiated using Diffie-Hellman key exchange protocol followed by RSA algorithm. As the new scheme uses Diffie-Hellman and RSA algorithm, the security of the overall system depends on discrete logarithm as well as factorization problem and thus, its security is more than public-key RSA. Finally, some new cryptographic applications of the proposed modifications are described that certainly extend the applications of the existing RSA.
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2. Preliminaries

Since the modifications of RSA are proposed using Diffie-Hellman (DH) key exchange protocol, thus DH and RSA techniques are introduced below.

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