Privacy-Preserving Decision-Making Over Blockchain

Abstract

Many blockchain applications require democratic on-chain decision-making. In this work, we propose a community-inclusive decentralised collaborative decision-making system with privacy assurance. Its key component is a two-stage voting scheme inspired by choice architecture. Our decision-making system is compatible with most existing blockchain infrastructures. In addition, it supports liquid democracy/delegative voting for better collaborative intelligence. Namely, stake holders can either vote directly on proposals or delegate their voting power to experts. When majority of voting committee members are honest, no one can derive voters' voting preferences or delegations with non-negligible probability. To support concurrent multiple voting events, we design a distributed batch key generation protocol that can generate multiple keys simultaneously by voting committee members with amortised communication cost of O(n) per key, where n is the number of participants. Besides, our system supports "evolving committee", i.e., voting committee members can be changed during the voting period. We implemented a pilot system in Scala, benchmark results indicate that our system can support large number of participants with high efficiency.

Blockchain of things (BoT) innovation for smart tourism

“…They linked such similar use cases as force chain operation, secure payments, and smart contracts. Chen, Li, et al (2020), Chen, Xu, et al (2020) explored the operation of BoT in the environment of tourism and linked several challenges and openings. They suggested that BoT could ameliorate the translucency, security, and effectiveness of tourism operations, but stressed issues as standardization and interoperability.…”

“…The availability of blockchain networks can also ameliorate the effectiveness and effectiveness of business operations by reducing sale times and costs, as well as adding robotization and security (Aste et al, 2017). Likewise, the availability of blockchain networks can enhance sequestration and data protection, as users can have lesser control over their information (Chen, Li, et al, 2020; Chen, Xu, et al, 2020). Eventually, exploration has shown that the availability of blockchain networks can ameliorate the sustainability of diligence, similar to the energy sector, by enabling peer‐to‐peer energy trading and reducing carbon emissions.…”

“…The use of blockchain technology in force chain operation can ameliorate translucency and responsibility, which can enhance trust and reduce sale times and costs (Zhang et al, 2018). Likewise, the use of blockchain technology can enhance sequestration and data protection, which can ameliorate trust and relinquishing of blockchains (Chen, Li, et al, 2020; Chen, Xu, et al, 2020). Another study set up that trust in blockchain can appreciatively impact the intention to use blockchain‐grounded trip recommendation systems.…”

“…Another study showed that blockchain security can give benefits in the fiscal sector, including secure cross‐border payments and reduced sale costs (Aste et al, 2017). Finally, exploration has also shown that blockchain security can enhance sequestration and data protection, which can ameliorate storer trust in blockchain technology (Chen, Li, et al, 2020; Chen, Xu, et al, 2020). This is related to the hypothesis as follows:H1 Security is positively related to the functional benefits of blockchain.…”

“…The use of blockchain in force chain operation can give a transparent and secure tally of deals, which can increase trust and reduce sale times and costs (Zhang et al, 2018). Likewise, the use of blockchain technology can enhance sequestration and data protection, which can ameliorate storer trust and closing of blockchains (Chen, Li, et al, 2020; Chen, Xu, et al, 2020). Another study showed that blockchain can enable substantiated and real‐time trip recommendations, which can enhance the tourism experience and increase satisfaction (Xiao et al, 2019).…”