Title: Improved secure RSA cryptosystem for data confidentiality in cloud

Authors: M. Thangavel; P. Varalakshmi

Addresses: Department of Information Technology, Thiagarajar College of Engineering, Madurai, 625015, Tamilnadu, India ' Department of Computer Technology, Madras Institute of Technology, Anna University, Chennai, 600-044, Tamilnadu, India

Abstract: Technologies like cloud computing provide a generous storage service to outsource the business and personal data. The major research challenge of data outsourcing is ensuring data confidentiality. Public key cryptography (PKC) is used in an open networking environment like the internet, for secure communication without depending on a secure channel, even for key exchange. One of the common and well known PKC is RSA cryptosystem. In this paper, an improved secure RSA cryptosystem (ISRSAC) has been proposed to increase the complexity in factorising the value of modulus 'n'. In ISRSAC, due to the complexity of computation in 'n', it is computationally difficult to factorise and perform cryptanalysis. A comparison is done with RSA, MREA and ESRKGS cryptosystems to show that ISRSAC is efficient. The experimental results prove that ISRSAC consumes more time for cryptanalysis compared to ESRKGS, MREA and RSA cryptosystems and provides security for data outsourcing in the cloud.

Keywords: cryptography; cloud computing; data confidentiality; data outsourcing; RSA; data security; public key cryptosystem; cryptanalysis; key exchange; encryption; decryption.

DOI: 10.1504/IJISCM.2017.091269

International Journal of Information Systems and Change Management, 2017 Vol.9 No.4, pp.261 - 277

Received: 13 May 2017
Accepted: 16 Dec 2017
Published online: 19 Apr 2018 *

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