Performance Study of Cryptography based Dynamic Multi-Keyword Searchable Security Algorithm in Cloud Using CRSA /B+ Tree

Abstract

Today Cloud computing is a buzz word in IT industry Cloud a shared pool of computing resources allows access to needed resources on demand through internet and web applications Since data is outsourced to third party user needs to maintain the accountability of their data in cloud Hence preserving the confidentiality and securing the sensitive data in cloud is a major concern Many cryptographic techniques have been proposed by researchers to assure the confidentiality of the user s data in cloud But the challenging task is to provide the secure search over this preserved data which has been encrypted so as to retrieve the effective data Hence we are proposing a system to have a secure search over the encrypted data on the cloud which preserves its confidentiality In our system a noble approach has been made using the Commutative-RSA algorithm a cryptographic technique where the dual encryption takes place thus reducing the overall computation overhead The search operation over the encrypted data is based on the tree search algorithm which supports multi-keyword search Based on the relevance score the more appropriate data is retrieved on the search operation Using this approach the information is not leaked when the encrypted data is searched by users and also the queries are handled in an efficient way Finally we demonstrate the effectiveness and efficiency of the proposed schemes through extensive experimental evaluation