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Pay-To-Win: Incentive Attacks on Proof-of-Work Cryptocurrencies
Cryptocurrencies blockchain smart contracts
2019/7/4
The feasibility of bribing attacks on cryptocurrencies was first highlighted in 2016, with various new techniques and approaches having since been proposed. Recent reports of real world 51%51% attacks...
Updatable Anonymous Credentials and Applications to Incentive Systems
anonymity anonymous credentials incentive systems
2019/2/25
In this paper, we introduce updatable anonymous credential systems (UACS) and use them to construct a new privacy-preserving incentive system. In a UACS, a user holding a credential certifying some at...
P2P file sharing systems require proper incentive mechanisms to encourage active data sharing. However, traditional incentives based on reputation, credit or tit-for-tat are still challenged by free r...
DeepChain: Auditable and Privacy-Preserving Deep Learning with Blockchain-based Incentive
deep learning blockchain privacy-preserving training
2018/7/17
Deep learning technology has been evaluated to achieve the high-accuracy of state-of-the-art algorithms in a variety of AI tasks. Its popularity draws security researchers’ attention to the topic of p...
Tortoise and Hares Consensus: the Meshcash Framework for Incentive-Compatible, Scalable Cryptocurrencies
crypto-currency bitcoin consensus
2017/4/11
We propose Meshcash, a new framework for cryptocurrency protocols that combines a novel, proof-of-work based, permissionless byzantine consensus protocol (the tortoise) that guarantees eventual consen...
Rational Protocol Design: Cryptography Against Incentive-driven Adversaries
Cryptographic Protocols Game Theory Secure Computation Composition
2014/3/10
Existing work on “rational cryptographic protocols” treats each party (or coalition of parties) running the protocol as a selfish agent trying to maximize its utility. In this work we propose a fundam...
Guarantees for Customers of Incentive Anonymizing Networks
Guarantees Customers Incentive Anonymizing Networks
2009/6/2
We raise and propose solutions to the problem of guaranteeing that
a user of incentive remailing services for anonymization cannot lose money if
he does not get full service, i.e., if his message do...
Guarantees for Customers of Incentive Anonymizing Networks
Guarantees Customers of Incentive Anonymizing Networks
2008/5/21
We raise and propose solutions to the problem of guaranteeing that
a user of incentive remailing services for anonymization cannot lose money if
he does not get full service, i.e., if his message do...