Blockchain Merkle-Tree Ethereum Approach in Enterprise Multitenant Cloud Environment  

作　　者：Pooja Dhiman Santosh Kumar Henge Sartaj Singh Avinash Kaur Parminder Singh Mustapha Hadabou 

机构地区：[1]School of Computer Applications,Lovely Professional University,Phagwara,144001,India [2]School of Computer Science and Engineering,Lovely Professional University,Phagwara,144001,India [3]School of Computer Science,Mohammed VI Polytechnic University,Ben Guerir,43150,Morocco

出　　处：《Computers, Materials & Continua》2023年第2期3297-3313,共17页计算机、材料和连续体（英文）

摘　　要：This research paper puts emphasis on using cloud computing with Blockchain(BC)to improve the security and privacy in a cloud.The security of data is not guaranteed as there is always a risk of leakage of users’data.Blockchain can be used in a multi-tenant cloud environment(MTCE)to improve the security of data,as it is a decentralized approach.Data is saved in unaltered form.Also,Blockchain is not owned by a single organization.The encryption process can be done using a Homomorphic encryption(HE)algorithm along with hashing technique,hereby allowing computations on encrypted data without the need for decryption.This research paper is composed of four objectives:Analysis of cloud security using Blockchain technology;Exceptional scenario of Blockchain architecture in an enterprise-level MTCE;Implementation of cipher-text policy attribute-based encryption(CPABE)algorithm;Implementation of Merkle tree using Ethereum(MTuE)in a Multi-tenant system.Out of these four objectives,the main focus is on the implementation of CP-ABE algorithm.CP-ABE parameters are proposed for different levels of tenants.The levels include inner tenant,outer tenant,Inner-Outer-Tenant,Inner-Outer-External-Tenant,Outer-Inner-Tenant,External-Outer-Inner-Tenant and the parameters such as token,private key,public key,access tree,message,attribute set,node-level,cipher-text,salting which will help in providing better security using CP-ABE algorithm in a multitenant environment(MTE)where tenants can be provided with different levels of security and achieved 92 percentage of authenticity and access-control of the data.

关 键 词：Blockchain(BC) merkle tree using ethereum(MTuE) multi-tenant environment(MTE) homomorphic encryption(HE) ciphertext policy attribute-based encryption(CP-ABE) 

分 类 号：TP393.11[自动化与计算机技术—计算机应用技术]