Delegated Proof of Secret Sharing: A Privacy-Preserving Consensus Protocol Based on Secure Multiparty Computation for IoT Environment

Abstract

With the rapid advancement and wide application of blockchain technology, blockchain consensus protocols, which are the core part of blockchain systems, along with the privacy issues, have drawn much attention from researchers. A key aspect of privacy in the blockchain is the sensitive content of transactions in the permissionless blockchain. Meanwhile, some blockchain applications, such as cryptocurrencies, are based on low-efficiency and high-cost consensus protocols, which may not be practical and feasible for other blockchain applications. In this paper, we propose an efficient and privacy-preserving consensus protocol, called Delegated Proof of Secret Sharing (DPoSS), which is inspired by secure multiparty computation. Specifically, DPoSS first uses polynomial interpolation to select a dealer group from many nodes to maintain the consensus of the blockchain system, in which the dealers in the dealer group take turns to pack the new block. In addition, since the content of transactions is sensitive, our proposed design utilizes verifiable secret sharing to protect the privacy of transmission and defend against the malicious attacks. Extensive experiments show that the proposed consensus protocol achieves fairness during the process of reaching consensus.

Securing the Internet of Things in Artificial Intelligence Era: A Comprehensive Survey

“…• Adoption of privacy-preserving techniques in IoT systems: Privacy-preserving techniques play a vital role in IoT systems by enabling data analysis while preserving the privacy of sensitive information. Techniques such as secure multiparty computation [53] or federated learning [54] allow data analysis to be performed without exposing raw data to third parties. By distributing the computation or learning process across multiple devices or parties, privacy-preserving techniques safeguard the confidentiality of data while still enabling collaborative analysis or machine learning models.…”

Delegated Proof of Accessibility (DPoAC): A Novel Consensus Protocol for Blockchain Systems

“…Geng et al [20] proposed an enhanced consensus system that incorporates a verifiable secret sharing scheme in the context of a large blockchain network. Privacy preservation is ensured by verifiable secret sharing, and secure multiparty computation is used to enhance security, efficiency, and fairness.…”

Blockchain Socket Factories with RMI-Enabled Framework for Fine-Grained Healthcare Applications

“…The energy and delay level blockchain frameworks suggested in [ 25 , 26 , 27 , 28 , 29 , 30 ] improve the constraints on the above frameworks; however, resource consumption, costs, and deadlines of applications are still compared to the state-of-the-art blockchain in the system. The blockchain consensus has been widely implemented for different applications such as proof of work [ 31 ], proof of stake [ 32 ], delegated proof of stake (DPoS) [ 33 ], and leased proof of stake (LPoS) [ 34 ] to enable transaction validation in the blockchain nodes during processing in the network.…”

“…This study compared the consensus methods of blockchain technologies for healthcare applications in a simulation environment. This study implemented four existing blockchain consensus schemes, i.e., PoW [ 31 ], PoS [ 32 ], DPoS [ 33 ] and LPoS [ 34 ], to compare them with the PPoV for fine-grained healthcare applications in the framework.…”