Non-deterministic Paillier Endorsement Asymmetric Key Cryptosystem-Based Whirlpool Hashing Quotient Filter for Secured Data Access on Cloud Storage

Abstract

A non-deterministic Paillier endorsement asymmetric key cryptosystem-based Whirlpool hashing quotient filter (NPEAKC-WHQF) model is proposed with aim of securing cloud storage and data access with lower space complexity. Initially, the user registers his/her detail to cloud server (CS). After registering, the CS generates endorsement public key and private key. Then, cloud user (CU) encrypts data with their endorsement public key and sends to CS. CS stores ciphertext of data in Whirlpool hashing quotient filter (WHQF) with minimal memory space. During data access, CU sends request message. After receiving the request, CS checks endorsement public key of CU and allows only authorized user to access data. After verifying endorsement public key, user decrypts data with their endorsement private key. This helps for NPEAKC-WHQF model to improve data access security. NPEAKC-WHQF model conducts an experiment using factors, namely space complexity, data confidentiality rate, and authentication accuracy with respect to diverse number of user and data.