This paper proposes EPPCDS, an efficient privacy-preserving cloud data sharing scheme with blockchain-assisted access control and periodic integrity checking, and demonstrates that it outperforms representative existing schemes in terms of policy creation, policy update, and data access efficiency.
Abstract
Cloud-assisted data sharing has become the preferred approach for data exchange. Despite its popularity, the loss of physical control over outsourced data has intensified data owners’ concerns regarding data privacy and security. Existing attribute-based encryption schemes achieve fine-grained access control, but face an efficiency-security trade-off in policy updates, key privacy leakage risks, and a lack of proactive periodic integrity verification, limiting their practical application. To address these issues, this paper proposes EPPCDS, an efficient privacy-preserving cloud data sharing scheme with blockchain-assisted access control and periodic integrity checking. EPPCDS implements key-level fine-grained access control via multi-keyword searchable encryption for low-overhead secure policy updates, and adopts a double-layer digital envelope mechanism combined with certificateless cryptography and identity randomization to protect decryption tokens and user identity privacy. It also integrates provable data possession with a deposit-based reward-penalty mechanism to realize proactive periodic integrity verification. We conduct a thorough security analysis confirming EPPCDS satisfies diverse security demands in cloud data sharing. Extensive experiments on a Hyperledger Fabric prototype demonstrate that EPPCDS incurs low runtime overhead for all participating parties and outperforms representative existing schemes in terms of policy creation, policy update, and data access efficiency.
The findings indicate that unifying adaptive privacy preservation with decentralized integrity auditing yields a more complete cloud-security posture than either mechanism alone, and the paper outlines the empirical validation, including full-scale testbed experiments, required before deployment.
Jayakumar D, M. Ramamoorthy· International journal of com...· 0 citations
This research introduces a novel Unified Quantum-Resilient Blockchain-Zero Knowledge Proofs Privacy Authentication Framework (QBC-ZKPAF), which provides strong security and privacy solutions for Internet of Things networks by adopting multi-factor authentication and decentralizing identity management.
Uzma Shereen, Lubna Nausheen· American Journal of AI Cyber...· 0 citations
The Internet of Vehicles (IoV) is evolving into a distributed electronic sensing and communication infrastructure in which vehicles, roadside units, and service platforms continuously exchange data for intelligent transportation services. However, cross-organization sharing of vehicle-borne sensing data can expose identity links, location traces, task routes, and raw sensor content. This paper proposes BAPPS, a Blockchain-Assisted Privacy-Preserving Sharing Scheme for Secure Data Exchange in the Internet of Vehicles. BAPPS combines anonymous identity issuance, zk-SNARK-based data-quality verification, elliptic-curve proxy re-encryption, and on-chain audit records. Data owners can prove that encrypted observations satisfy task-specific quality or access constraints without disclosing raw data, while a semi-honest service provider transforms ciphertexts only under authorization. The consortium blockchain records task publication, access verification, proof submission, and data-hash evidence, enabling traceable sharing without exposing plaintext observations. We further implement a Tendermint-style BFT consensus layer, denoted BAPPS-T, to reduce confirmation latency in the data-sharing workflow. Using the three available real Tendermint benchmark workbooks as repeated records, BAPPS-T achieved a mean consensus latency of 776.3 ms at 100 nodes (SD = 80.8 ms, n = 3, 95% CI = 575.5–977.1 ms), corresponding to a 90.17% latency reduction relative to Baseline 1. The results indicate that BAPPS can provide a reproducible protocol layer for trusted, privacy-aware sharing of mobile electronics observations under explicit deployment assumptions.
Lin Wang, Ke Chen, Fangxiao Li et al.· Electronics· 0 citations
This research presents a novel decentralized identity management system leveraging Ethereum smart contracts and cryptographic protocols to enable self-sovereign digital identities and introduces a privacy-preserving mechanism using encryption-key splitting among trusted peers to enable recovery of encrypted off-chain data.
Harika Naidu Beesabathuni· International Journal of Int...· 0 citations
The growing use of digital healthcare services has greatly improved access to medical information. However, it has also created serious challenges in protecting the privacy and integrity of healthcare insurance data. Traditional centralized storage systems can be vulnerable to unauthorized access, data tampering, and security breaches. This limits their ability to manage sensitive patient records. This paper introduces a blockchain-based framework designed to protect the privacy of healthcare insurance data using optimized Elliptic Curve Cryptography (ECC). In this framework, healthcare records are encrypted with an optimized ECC algorithm before being stored on a blockchain. This ensures secure and tamper-proof data management. A role-based access mechanism allows secure interactions between healthcare providers and insurance organizations while blocking unauthorized access to private information. The framework also includes secure cryptographic key management and verifies blockchain integrity to protect encrypted records during the data-sharing process. Experimental results show that this approach offers secure storage, controlled access, and efficient cryptographic performance while maintaining the confidentiality and integrity of healthcare insurance data. The framework provides a practical and scalable solution for sharing healthcare information securely in today's insurance environments.
Karimuddin Mahammad Sadhik, R. V., Ravi Kiran K· International Journal of Inn...· 0 citations
