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A survey of trust and reputation systems for online service provision
, 2005
"... Trust and reputation systems represent a significant trend in decision support for Internet mediated service provision. The basic idea is to collect information about potential service providers in order to select the most reliable and trustworthy provider of services and information and to avoid th ..."
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Cited by 632 (15 self)
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Trust and reputation systems represent a significant trend in decision support for Internet mediated service provision. The basic idea is to collect information about potential service providers in order to select the most reliable and trustworthy provider of services and information and to avoid the less trustworthy. A natural side effect is that it also provides an incentive for good behaviour and therefore tends to have a positive effect on market quality. Reputation systems can be called collaborative sanctioning systems to reflect their collaborative nature, and are related to collaborative filtering systems. Reputation systems are already being used in successful commercial online applications. There is also a rapidly growing literature around trust and reputation systems, but unfortunately this activity is not very coherent. The purpose of this paper is to give an overview of existing and proposed systems that can be used to derive measures of trust and reputation for Internet transactions, to analyse the current trends and developments in this area, and to propose a research agenda for trust and reputation systems.
Trust in multi-agent systems
, 2004
"... Trust is a fundamental concern in large-scale open distributed systems. It lies at the core of all interactions between the entities that have to operate in such uncertain and constantly changing environments. Given this complexity, these components, and the ensuing system, are increasingly being co ..."
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Cited by 182 (17 self)
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Trust is a fundamental concern in large-scale open distributed systems. It lies at the core of all interactions between the entities that have to operate in such uncertain and constantly changing environments. Given this complexity, these components, and the ensuing system, are increasingly being conceptualised, designed, and built using agent-based techniques and, to this end, this paper examines the specific role of trust in multi-agent systems. In particular, we survey the state of the art and provide an account of the main directions along which research efforts are being focused. In so doing, we critically evaluate the relative strengths and weaknesses of the main models that have been proposed and show how, fundamentally, they all seek to minimise the uncertainty in interactions. Finally, we outline the areas that require further research in order to develop a comprehensive treatment of trust in complex computational settings.
A Robust Reputation System for P2P and Mobile Ad-hoc Networks
, 2004
"... Reputation systems can be tricked by the spread of false reputation ratings, be it false accusations or false praise. Simple solutions such as exclusively relying on one's own direct observations have drawbacks, as they do not make use of all the information available. We propose a fully distri ..."
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Cited by 170 (0 self)
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Reputation systems can be tricked by the spread of false reputation ratings, be it false accusations or false praise. Simple solutions such as exclusively relying on one's own direct observations have drawbacks, as they do not make use of all the information available. We propose a fully distributed reputation system that can cope with false disseminated information. In our approach, everyone maintains a reputation rating and a trust rating about everyone else that they care about. From time to time first-hand reputation information is exchanged with others; using a modified Bayesian approach we designed and present in this paper, only second-hand reputation information that is not incompatible with the current reputation rating is accepted. Thus, reputation ratings are slightly modified by accepted information. Trust ratings are updated based on the compatibility of second-hand reputation information with prior reputation ratings. Data is entirely distributed: someone's reputation and trust is the collection of ratings maintained by others. We enable redemption and prevent the sudden exploitation of good reputation built over time by introducing re-evaluation and reputation fading.
Enhanced Reputation Mechanism for Mobile Ad Hoc Networks
- In Proceedings of the 2nd International Conference on Trust Management, LNCS 2995
, 2004
"... Abstract. Interactions between entities unknown to each other are inevitable in the ambient intelligence vision of service access anytime, anywhere. Trust management through a reputation mechanism to facilitate such interactions is recognized as a vital part of mobile ad hoc networks, which features ..."
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Cited by 77 (3 self)
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Abstract. Interactions between entities unknown to each other are inevitable in the ambient intelligence vision of service access anytime, anywhere. Trust management through a reputation mechanism to facilitate such interactions is recognized as a vital part of mobile ad hoc networks, which features lack of infrastructure, autonomy, mobility and resource scarcity of composing light-weight terminals. However, the design of a reputation mechanism is faced by challenges of how to enforce reputation information sharing and honest recommendation elicitation. In this paper, we present a reputation model, which incorporates two essential dimensions, time and context, along with mechanisms supporting reputation formation, evolution and propagation. By introducing the notion of recommendation reputation, our reputation mechanism shows effectiveness in distinguishing truth-telling and lying agents, obtaining true reputation of an agent, and ensuring reliability against attacks of defame and collusion. 1
A Survey of Trust Management and Resource Discovery Technologies in Peer-to-Peer Applications
, 2004
"... Decentralized peer-to-peer (P2P) applications are characterized by the absence of a central authority or infrastructure that coordinates the behavior of entities in the system. These entities, called peers, interact directly with each other and make local autonomous decisions in order to achieve the ..."
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Cited by 31 (6 self)
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Decentralized peer-to-peer (P2P) applications are characterized by the absence of a central authority or infrastructure that coordinates the behavior of entities in the system. These entities, called peers, interact directly with each other and make local autonomous decisions in order to achieve their individual goals. In the absence of a single authority that maintains all the data and handles all the queries, peers themselves are responsible for seeking, storing, and sharing information efficiently. Placing a large amount of information on every peer or broadcasting a request to every peer greatly reduces the performance and efficiency of the system. Hence, it is essential that decentralized applications employ efficient storage mechanisms and reliable search mechanisms. Further, an open decentralized system that does not regulate the joining of peers can be subject to grave risks. In particular, malicious peers may be encouraged to resort to a variety of attacks, including sending spurious information, posing as other peers, etc. It is important for each peer in the system to defend against such attacks. This survey discusses these two essential issues that characterize P2P decentralized applications: storage and discovery mechanisms, and trust management. It identifies and defines key properties for each of these and also summarizes the efforts of the P2P community in addressing these properties by categorizing and discussing relevant technologies and approaches.
A Reputation and Trust Management Broker Framework for Web Applications
- In International Conference on e-Technology, e-Commerce, and e-Services
, 2005
"... This paper presents a distributed reputation and trust management framework that addresses the challenges of eliciting, evaluating and propagating reputation for web applications. We propose a broker framework where every service user is associated with a broker who may represent multiple users. A b ..."
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Cited by 29 (3 self)
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This paper presents a distributed reputation and trust management framework that addresses the challenges of eliciting, evaluating and propagating reputation for web applications. We propose a broker framework where every service user is associated with a broker who may represent multiple users. A broker collects for its users the distributed reputation ratings about any web service. In return, a user provides its broker the transaction rating after every transaction with any service in order to build up the reputation database on all services. In addition, brokers form a trust network where they exchange and collect reputation data about services. By delegating trust management to brokers, individual users only need to ask their brokers about the reputation of a service before any transaction with a server. The only overhead for a user is the responsibility to share the reputation feedback with its broker. We present the distributed reputation and trust management framework and show the performance of the system by simulations. 1.
An Incentives’ Mechanism Promoting Truthful Feedback in Peer-to-Peer Systems
- In Proceedings of IEEE/ACM CCGRID
, 2005
"... We propose a mechanism for providing the incentives for reporting truthful feedback in a peer-to-peer system for exchanging services. This mechanism is to complement reputation mechanisms that employ ratings ’ feedback on the various transactions in order to provide incentives to peers for offering ..."
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Cited by 28 (7 self)
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We propose a mechanism for providing the incentives for reporting truthful feedback in a peer-to-peer system for exchanging services. This mechanism is to complement reputation mechanisms that employ ratings ’ feedback on the various transactions in order to provide incentives to peers for offering better services to others. Under our approach, both transacting peers (rather than just the client) submit ratings on performance of their mutual transaction. If these are in disagreement, then both transacting peers are punished, since such an occasion is a sign that one of them is lying. The severity of each peer’s punishment is determined by his corresponding non-credibility metric; this is maintained by the mechanism and evolves according to the peer’s record. When under punishment, a peer is not allowed to transact with others. We present the results of a multitude of experiments of dynamically evolving peer-to-peer systems. The results show clearly that our mechanism detects and isolates effectively liar peers, while rendering lying costly. Also, our mechanism diminishes the efficiency losses induced to sincere peers by the presence of large subsets of the population of peers that provide their ratings either falsely or according to various unfair strategies. Finally, we explain how our approach can be implemented in practical cases of peer-to-peer systems. 1.
Reputation bootstrapping for trust establishment among web services, Internet Comput
, 2009
"... Reputation systems rely on past information to establish trust among unknown participants. Reputation bootstrapping, i.e., assessing the reputations of newly deployed Web services (newcomers), is a major issue in service-oriented environments as no historical information may be present about newcome ..."
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Cited by 22 (1 self)
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Reputation systems rely on past information to establish trust among unknown participants. Reputation bootstrapping, i.e., assessing the reputations of newly deployed Web services (newcomers), is a major issue in service-oriented environments as no historical information may be present about newcomers. We present different techniques to bootstrap the reputation of newcomers in a service-oriented environment in a fair and accurate manner. We also present experiment results that evaluate the proposed techniques. 1
An incentive compatible reputation mechanism for ubiquitous computing environments
- International Journal of Information Security
, 2007
"... An incentive compatible reputation mechanism for ubiquitous computing environments ..."
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Cited by 21 (1 self)
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An incentive compatible reputation mechanism for ubiquitous computing environments
Reputation and Trust-based Systems for Ad Hoc and Sensor Networks
"... Reputation and trust are two very useful tools that are used to facilitate decision making in diverse fields from an ancient fish market to state-of-the-art ecommerce. Reputation is the opinion of one entity about another. In an absolute context, it is the trustworthiness of an entity [26]. Trust, o ..."
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Cited by 21 (2 self)
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Reputation and trust are two very useful tools that are used to facilitate decision making in diverse fields from an ancient fish market to state-of-the-art ecommerce. Reputation is the opinion of one entity about another. In an absolute context, it is the trustworthiness of an entity [26]. Trust, on the other hand, is
