THC-DFECC-based privacy preserved smart contract creation for cloud data security

Currently, cloud services have become a novel business model for information services owing to the rapid development of Cloud Computing (CC) technology. Hence, an efficient Smart Contract (SC) creation for cloud data security is proposed in this work. Primarily, the registered Data Owner (DO) selects the file to be uploaded. Then, the data is securitized utilizing Twisted Hessian Curve-based Digit Folding Elliptic Curve Cryptography (THC-DFECC). Afterward, the data is securely uploaded into the Interplanetary File System (IPFS). Thereafter, the DO creates the SC. By utilizing Gini Canberra-k-anonymity (GC-k-anonymity), the SC data is preserved, and it is hashed using the Exponential Entropy-based SWIFFT hashing algorithm (EE-SWIFFT). After that, it is securely uploaded into the BlockChain (BC). Conversely, the Data User (DU) sends the data access request to IPFS. Next, IPFS generates the token, which is verified with the data access request. If it matches, the hashed data is sent to DU. Lastly, the verification for accessing the data is performed in which the SC is created by DU and verified with the BC. If it matches, the verification at Cloud Server Authority (CSA) is performed. According to the experimental results, the proposed technique withstands a higher security level as compared to existing methodologies.