期刊名称：Journal of Theoretical and Applied Information Technology
印刷版ISSN：1992-8645
电子版ISSN：1817-3195
出版年度：2014
卷号：67
期号：3
出版社：Journal of Theoretical and Applied
摘要：Cloud storage enables client to access the data from anywhere at any time. Cloud based outsourced storage helps the clients to manage and conserve the data on self-sufficient platform. Probabilistic query and periodic verification on cloud zone provide public auditing but the cloud storages do not offer the clients with proof for verifying the integrity of the user. The authentication system based on Merkle Hash Tree construction is an efficient data dynamics system, yet not effective in improving storage. To improve the verification process on the cloud audit data services, Homomorphism Authenticators using Sphere Shaped Marker (HASSM) mechanism is proposed in this paper. HASSM mechanism develops a dynamic group and audits the integrity of stored data in the cloud services using the extendable dynamic hash structure. The sphere shaped marker signature verifies the information and subsequently audit the integrity of the shared data. With HASSM mechanism, the identity of the marker on each block stored data is kept private from a Third Party Auditor (TPA). TPA correctly detects any unauthorized users in HASSM for accessing the cloud files by applying KeyGener, SphereSign and SphereVerify algorithm to perform the process. TPA uses HASSM mechanism to validate the integrity of stored information without retrieving the whole file, so that the computational cost is reduced. HASSM Mechanism provides the approximately 9.188 % better verification result with lesser computational cost. Experiment is conducted in the Cloudsim platform on the factors such as auditing time, read/write efficiency on cloud services, and bandwidth utilization for data auditing.
