Abstract Cloud computing is the method of employing a set-up of isolated servers to be hosted on the web to accumulate and supervise information instead of an area server or a private laptop. Storage of data in cloud sometimes creates security issues in the data stored so, security in provided for the stored cloud data. In order to provide secured cloud data transaction, our proposed method initially verifies the authentication of the user followed by splitting the information of the user using pattern- matching technique. The blowfish computation is used to encrypt the alienated data. After encryption, resorting to the selection of the optimal position of a data center by means of the cross grey wolf optimization and firefly technique is done. Finally, the encrypted data are stored at an optimal location in the cloud. Then the data split column wise and separated at an optimal location in the cloud, this method is highly secured since the user cannot retrieve the file without authentication verification.

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[32] Zissis D. and Lekkas D., “Addressing Cloud Computing Security Issues,” Future Generation Computer Systems, vol. 28, no. 3, pp. 583-592, 2012. Dinesh Elangovan obtained his Bachelor’s degree in Electronics and Communication from Anna University, Chennai. Then he obtained his Master’s degree in Applied Electronics and PhD doing in Information & Communication majoring in Cloud Computing, Big Data Analytics and Networking both from Anna University, Chennai, Tamilnadu, India. He has also obtained Computer Networking professional qualifications. Currently, he is a SeniorAssistant Professor at the Faculty of Electronics and Communication Engineering, M.Kumarasamy College of Engineering, Karur. His specializations include Cloud Security, networking, and Virtual Reality. His current research interests are Cloud Data Security Formation, Public Key Infrastructure, Network Security, Authentication Server, Virtual Simulation, Virtual Reality and Cryptographic Techniques. Ramesh Muthiya received the B.E. degree in Electronics and Communication Engineeringfrom National Institute of Technology (Formerly REC), Trichy, India, in 2001 and the M.E. degree in Applied Electronics from the Anna University, Chennai, India, in 2004. He was awarded his Ph.D. degree in Information and Communication Engineering from Anna University, Chennai, India, in 2012.; He is currently working as Professor in the Department of Electronics and Communication Engineering at K.P.R Institute of Engineering and Technology, Coimbatore, India. He has published 69 articles in international and national journals and more than 33 papers in international and national conferences. His current research focuses are in Image processing, VLSI design, Embedded systems and Wireless networks. He is a life member of the ISTE, a member of the IAENG and a life member of the IETE.