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Sync HotStuff: Synchronous SMR with 2∆ Latency and Optimistic Responsiveness
Distributed computing blockchains consensus protocols
2019/3/13
Synchronous solutions for building Byzantine Fault Tolerance (BFT) replication can be safe when < 1/2 of the replicas fail. Assuming ΔΔ is an upper bound on the time for messages to arrive, these solu...
Mixing Networks are protocols that allow a set of senders to send messages anonymously. Such protocols are fundamental building blocks to achieve privacy in a variety of applications, such as anonymou...
Thunderella: Blockchains with Optimistic Instant Confirmation
blockchains optimistic responsiveness
2017/9/25
State machine replication, or “consensus”, is a central abstraction for distributed systems where a set of nodes seek to agree on an ever-growing, linearly-ordered log. In this paper, we propose a pra...
A Greedy Approximation of Bayesian Reinforcement Learning with Probably Optimistic Transition Model
Reinforcement Learning Uncertain Knowledge Probabilistic Reasoning Optimal Behavior in Polynomial Time
2013/5/2
Bayesian Reinforcement Learning (RL) is capable of not only incorporating domain knowledge, but also solving the exploration-exploitation dilemma in a natural way. As Bayesian RL is intractable except...
Effects of Feedback on Self-Efficacy Expectations Based on the Athlete’s Optimistic Profile
Positive Psychology Optimism Self-Efficacy Feedback Sport
2013/2/21
In recent years, the study of optimism and its possible influence on athletic performance has increased considerably. The key purposes of this study can be summarized as: 1) analyze how self-efficacy ...
Super-exponential bubbles in lab experiments: evidence for anchoring over-optimistic expectations on price
rational expectations nancial bubbles speculation anchoring laboratory experiments behavioral model super-exponential growth
2012/6/2
We analyze a controlled price formation experiment in the laboratory that shows evidence for bubbles. We calibrate two models that demonstrate with high statistical significance that these laboratory ...
The Influence of Optimistic Expectations and Negative Life Events on Somatic Symptoms among Adolescents: A One-Year Prospective Study
Optimism Negative Life Events Somatic Symptoms Senior High School Students
2013/2/19
This study prospectively examined the main effect of optimism on subsequent somatic symptomatology as well as optimism as moderating factors in the link between negative life events and somatic sympto...
Optimistic limits of the colored Jones invariants
Optimistic limits colored Jones invariants
2010/12/7
We show that the optimistic limits of the colored Jones invariants of the hyperbolic knots coincide with the minus of the optimistic limit of the Kashaev invariants modulo 22.
Framework for Analyzing Optimistic Fair Exchange with Distributed Arbiters
Framework Analyzing Optimistic Fair Exchange Distributed Arbiters
2009/6/11
We nominate Alptekin K¨upc¸ ¨u for the Best Student Paper Award
Abstract
Fair exchange is one of the most fundamental problems in secure distributed computation. Alice has
something that Bob ...
Usable Optimistic Fair Exchange
Optimistic Fair Exchange sacrificing performance digital files
2009/6/9
Fairly exchanging digital content is an everyday problem. It has been shown that fair
exchange cannot be done without a trusted third party (called the Arbiter). Yet, even with a trusted
party, it i...
Optimistic Asynchronous Atomic Broadcast
Asynchronous Consensus Byzantine Faults Atomic Broadcast
2009/4/16
This paper presents a new protocol for atomic broadcast in an asynchronous network with a
maximal number of Byzantine failures. It guarantees both safety and liveness without making
any timing assum...
Constructing Optimistic Fair Exchange Protocols from Committed Signatures
Committed signature scheme optimistic fair exchange protocols strong RSA assumption
2009/4/9
In PODC 2003, Park et al. [32] first introduce a connection
between fair exchange and sequential two-party multi-signature scheme
and provide a novel method of constructing fair exchange protocol by...
Breaking and Repairing Optimistic Fair Exchange from PODC 2003
Optimistic Fair Exchange PODC multisignature schemes
2009/4/9
In PODC 2003, Park, Chong, Siegel and Ray [22] proposed an optimistic protocol for fair
exchange, based on RSA signatures. We show that their protocol is totally breakable already in the registration...
Efficient and Optimistic Fair Exchanges Based on Standard RSA with Provable Security
Efficient and Optimistic Fair Exchanges Standard RSA Provable Security
2009/4/3
Efficient and Optimistic Fair Exchanges Based on Standard RSA with Provable Security.
The Future of Evidence-Based Social Work: An Optimistic View?
Future Evidence-Based Social Work
2008/10/13
The abbreviated article contains a brief overview of the contemporary state of evidence-based social work (EBSW) and projections of its likely future. The forecast is based upon a review and analysis ...