TY  - EJOU
AU  - Dhiman, Pooja 
AU  - Henge, Santosh Kumar 
AU  - Singh, Sartaj 
AU  - Kaur, Avinash 
AU  - Singh, Parminder 
AU  - Hadabou, Mustapha 

TI  - Blockchain Merkle-Tree Ethereum Approach in Enterprise Multitenant Cloud Environment
T2  - Computers, Materials \& Continua

PY  - 2023
VL  - 74
IS  - 2
SN  - 1546-2226

AB  - 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 (CP-ABE) 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 multi-tenant environment (MTE) where tenants can be provided with different levels of security and achieved 92 percentage of authenticity and access-control of the data.
KW  - Blockchain (BC); merkle tree using ethereum (MTuE); multi-tenant environment (MTE); homomorphic encryption (HE); ciphertext policy attribute-based encryption (CP-ABE)

DO  - 10.32604/cmc.2023.030558