An incentive-compatible rational secret sharing scheme using blockchain and smart contract

Blockchain has been an emerging technology, which comprises lots of fields such as distributed systems and Internet of Things (IoT). As is well known, blockchain is the underlying technology of bitcoin, whose initial motivation is derived from economic incentives. Therefore, lots of components of blockchain (e.g., consensus mechanism) can be constructed toward the view of game theory. In this paper, we highlight the combination of game theory and blockchain, including rational smart contracts, game theoretic attacks, and rational mining strategies. When put differently, the rational parties, who manage to maximize their utilities, involved in blockchain chose their strategies according to the economic incentives. Consequently, we focus on the influence of rational parties with respect to building blocks. More specifically, we investigate the research progress from the aspects of smart contract, rational attacks, and consensus mechanism, respectively. Finally, we present some future directions based on the brief survey with respect to game theory and blockchain.

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“…e incentive mechanism (IC) is the core driving source of the technical value of the blockchain [13].…”

Section: Introductionmentioning

confidence: 99%

Rational Protocols and Attacks in Blockchain System

Chen

Wang

et al. 2020

Security and Communication Networks

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“…e personalized privacy measurement algorithm can calculate the user's privacy level, thereby protecting privacy data [20]. Moreover, the classification-anonymity model effectively guarantees the privacy of sensitive data [21].…”

Section: Protection On the Privacy Of Friendshipsmentioning

confidence: 99%

“…We select the interaction data within the time interval (Φ(t l ) � 0.367879) among users in the synthetic dataset. e number of interactions is set to 50; the weights of the interaction events take values in the range [1,20]; and the interaction evaluation takes values in the range (0, 1] as an example to verify the rationality of the trust calculations, that is,…”

Section: Synthetic Datasetmentioning

confidence: 99%

Anticollusion Attack Strategy Combining Trust Metrics and Secret Sharing for Friendships Protection

Tian

2021

Security and Communication Networks

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Online social networks provide users with services such as online interaction, instant messaging, and information sharing. The friend search engine, a new type of social application, provides users with the service for querying the list of other individuals’ friends. Currently, the existing research focuses on independent attacks for friend search engines while ignoring the more complicated collusion attacks, which can expose more friendships that users are not willing to share. Compared with independent attackers, collusion attackers share query results by cooperating with each other. In this article, we propose a resistance strategy against collusion attacks to protect the friendship privacy. The proposed trust metric is based on users’ behaviors and is combined with Shamir’s secret sharing system, which can transform friendships into secrets. Through secret distribution and reconfiguration, only the participants who meet the query requirements can successfully reconstruct the secret, while the participants who do not meet the query conditions cannot successfully obtain the secret fragments even if they obtain the secret fragments. Experiments are conducted to verify the effectiveness of the proposed strategy and proved that this strategy can greatly limit the number of malicious attackers, greatly reduce the probability of successful collusion attacks, and reduce the number of victims.

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“…Recently, as a decentralized technology, blockchain [9][10][11] provides a feasible solution to ensure the data integrity.…”

Section: Introductionmentioning

confidence: 99%

A Privacy-Preserving Identity Authentication Scheme Based on the Blockchain

Gao

Zhang

et al. 2021

Security and Communication Networks

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Traditional identity authentication solutions mostly rely on a trusted central entity, so they cannot handle single points of failure well. In addition, most of these traditional schemes need to store a large amount of identity authentication or public key information, which makes the schemes difficult to expand and use in distributed situations. In addition, the user prefers to protect the privacy of their information during the identity verification process. Due to the open and decentralized nature of the blockchain, the existing identity verification schemes are difficult to apply well in the blockchain. To solve this problem, in this article, we propose a privacy protection identity authentication scheme based on the blockchain. The user independently generates multiple-identity information, and these identities can be used to apply for an identity certificate. Authorities use the ECDSA signature algorithm and the RSA encryption algorithm to complete the distribution of the identity certificate based on the identity information and complete the registration of identity authentication through the smart contract on the blockchain. On the one hand, it can realize the protection of real identity information; on the other hand, it can avoid the storage overhead caused by the need to store a large number of certificates or key pairs. Due to the use of the blockchain, there is no single point of failure in the authentication process, and it can be applied to distributed scenarios. The security and performance analysis show that the proposed scheme can meet security requirements and is feasible.

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An incentive-compatible rational secret sharing scheme using blockchain and smart contract

Cited by 24 publications

References 25 publications

Rational Protocols and Attacks in Blockchain System

Rational Protocols and Attacks in Blockchain System

Anticollusion Attack Strategy Combining Trust Metrics and Secret Sharing for Friendships Protection

A Privacy-Preserving Identity Authentication Scheme Based on the Blockchain

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