A blockchain-based secure multi-party privacy intersection verifiable computing scheme is proposed, which achieves the synergistic enhancement of privacy protection and computational credibility by integrating Paillier encryption algorithm, DH protocol key negotiation, HMAC-RSA authentication, Shamir secret sharing, AES encryption and zero-knowledge proof.
Abstract
With the increasing demand for data privacy protection, outsourcing secure multi-party privacy intersection is faced with the dual challenges of privacy leakage and computational credibility verification. This paper proposes a blockchain-based secure multi-party privacy intersection verifiable computing scheme, which achieves the synergistic enhancement of privacy protection and computational credibility by integrating Paillier encryption algorithm, DH protocol key negotiation, HMAC-RSA authentication, Shamir secret sharing, AES encryption and zero-knowledge proof. In view of the core requirements of verifiable computing, zero-knowledge proof technology is introduced and verification logic is automatically executed through smart contracts to ensure that the calculation results are accurate and cannot be tampered with. In view of the credibility of computing nodes, a dynamic reward and punishment mechanism based on trust function and utility function is designed to constrain the honest behavior of computing parties through economic incentives. The experimental results verify the effectiveness of the scheme.
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
Attribute-based encryption (ABE) is a promising primitive to protect data privacy and achieve flexible data sharing. Considering the increasing number of resource-limited devices in the Internet of Things (IoT) era, outsourcing the expensive decryption operations of ABE to a powerful proxy is helpful and necessary for users. However, the innate distrust between the user and the proxy makes security and fairness challenging. That is, the user would worry about whether the proxy executes the outsourced decryption honestly without breaking data confidentiality. Conversely, the proxy may be concerned that if she can get the deserved reward as promised. In this paper, we propose a blockchain-based scheme to provide secure and fair outsourced decryption service of attribute-based ciphertext. Specifically, we propose an efficient attribute-based encryption scheme with verifiable outsourced decryption (ABE-VOD), which enables the user to outsource most of the decryption operations securely and verify the returned result with little cost. We then integrate blockchain into ABE-VOD to manage the outsourced decryption tasks and deal with the reward and punishment issues as a trusted mediator, which could effectively guarantee fairness. Finally, we implement a proof-of-concept prototype on a local Ethereum testnet to evaluate the feasibility and performance of the proposed scheme.
Jialu Hao, Lin Ni, Wei Dai et al.· Peer-to-Peer Networking and...· 0 citations
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.
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 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
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