Modified Dynamic Hash Table with Threshold RSA for Dynamic and Public Auditing on Cloud Data
T. Kishore Babu1, Guruprakash C D2

1T. Kishore Babu, Department of CSE, Visvesvaraya Technological University, Gulbarga, India. 
2Dr. Guruprakash C D, Department of CSE, Sri Siddharatha Institute of Engineering & Technology, Maraluru, Tumakuru, India.
Manuscript received on 26 August 2019. | Revised Manuscript received on 13 September 2019. | Manuscript published on 30 September 2019. | PP: 765-772 | Volume-8 Issue-11, September 2019. | Retrieval Number: K14480981119/2019©BEIESP | DOI: 10.35940/ijitee.K1448.0981119
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

Abstract: Cloud storage is one of the major application in the cloud, which can provide the on-demand outsourcing data service for both organizations as well as individuals. The Data Integrity (DI) check in the cloud is applied by the user to ensure the integrity of data. The Third Party Auditing (TPA) technique is later introduced to check the cloud DI. Many research has been carried out in the public auditing to minimize the computation cost of the integrity check. The most existing method involves in lack of security and low computation overhead. In this research, the Modified Dynamic Hash Table with threshold Rivest, Shamir, and Adelman Algorithm (RSA) algorithm (MDHT-RSA) is proposed to improve the security and reduce the computation cost. The threshold RSA cryptography system increase the security by generating the secret key to the user and reduce the computation cost. The Modified Dynamic Hash Table (MDHT) is used to record the data information for dynamic auditing, which is located in the TPA. The MDHT is differed from the Dynamic hash table, that the MDHT doesn’t contain the tag block whereas the dynamic hash table has the tag block. The MDHT-RSA is analyzed with the computation cost and compared with existing method. The experimental result proved that the MDHT-RSA method has low computation cost than state-of-art method in public auditing. The verification cost of the MDHT-RSA is 1.3 s while a state-of-art method DHT-PA has the 1.35 s for the 200 blocks of data.
Keywords: Cloud storage, Modified Dynamic Hash Table algorithm, Public Auditing, Tag Block and Third Party Auditing.
Scope of the Article: