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Secure File Storage in Cloud Computing Using a Modified Cryptography Algorithm

Secure File Storage in Cloud Computing Using a Modified Cryptography Algorithm

Manya Smriti (Vellore Institute of Technology, India), Shruti Varsha Venkatraman (Vellore Institute of Technology, India), Aashish Raj (Vellore Institute of Technology, India), Vaishnavi Raj Shukla (Vellore Institute of Technology, India), and Aswani Kumar Aswani Cherukuri (Vellore Institute of Technology, India)
Copyright: © 2022 |Pages: 25
DOI: 10.4018/978-1-7998-8367-8.ch011
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Abstract

This chapter investigates the security issues identified with the file cloud storage to ensure the security of client information in cloud information server. The authors have proposed a modified RSA algorithm with multiple keys and CRT to ensure confidentiality of data coupled with hashing through SHA-512 to maintain integrity. This work has made a secure data exchange app where files are encrypted using the RSA-CRT algorithm and hashed later. On successfully implementing the work, they observed that the proposed technique is more secure than the original RSA algorithm and RSA-CRT. Furthermore, it enhanced the algorithm performance for decryption because it employed the CRT for decryption; thus, the proposed technique proved to be faster than RSA with multi keys.
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Introduction

The algorithm of RSA is an asymmetric cryptography technique. This is working on two keys, i.e. public key and private key. The proposed model in our work takes four prime evaluating techniques and discovers extension to build up a far-off information reviewing strategy that can be utilized to check the uprightness of the redistributed information in numbers for modified RSA. Instead of sending one public key directly, send two public keys to the receiver. However, there is the problem of the speed, so that in RSA decryption used the Chinese remainder theorem to enhancement the speed of RSA decryption.

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