Trust management for peers in P2P network is very much important due to its open and anonymous nature. In this paper, we propose a reputation based trust management scheme for partially decentralized peer-to-peer file sharing systems. Reputation data is stored at the super node level. We calculate the reputation value for each file by using fuzzy logic inferences, which can better handle uncert...

Sharing sensitive information across security domains is an important requirement for knowledge intensive collaborative work, but such sharing may impose risks on security and privacy integrity. Research has increasingly recognized the role of trust in minimizing the risk of information sharing across untrusted or unknown entities. To this extent, trust negotiations[1][3][15][20] have emerged a...

Security and usability are difficult to achieve simultaneously. As upcoming ubiquitous scenarios focus on usability, new security solutions are in high demand. We are following two approaches: “Inheritable Trust” which is an intuitive way of expressing and enforcing trust in a ubiquitous environment, and “Dynamic Trust Networks” which perhaps provide a mechanism for easy trust management in a l...

In this paper we survey trust computation models for Internet of things (IoT) systems for the purpose of service management, i.e., whether or not to select an IoT device as a service provider. Future IoT systems will connect the physical world into cyberspace everywhere and everything via billions of smart objects, and are expected to have a high economic impact. To date there is little work on...

Trust management is a concept of automatic verification of access rights against distributed security policies. A policy is described by a set of credentials that define membership of roles and delegation of authority over a resource between the members of roles. Making an access control decision is equivalent to resolving a credential chain between the requester and the role, which members are...

This paper outlines the findings of a survey on trust, captured through attitude, experience, behaviour and expectation, of members in a Government run online support network. Overall, the results show that participants have high expectations for the behaviour of others in the community, expecting them to be trustworthy, helpful and supportive. There is a gap, however, between the respondents‟ ...

Credentials are useful in many applications. For example, automated trust negotiation can be attained through the exchange of credentials. However, credentials endure all kinds of attacks during the transport while credentials bring us a lot of benefits. At the same time, how to store credentials is still a key problem to manage trust management systems. Good credential-storage design can great...

Reputation and trust-based models have gained popularity recently because they have been shown to be promising in the area of trust management. Despite this fact, building reliable systems still remains a challenge. Proposed models focus on historical and online information to determine the reputation of domain members. However, the dynamic nature of reputation and trust requires an equally dyn...

We introduce ctm, a process calculus which embodies a notion of trust for global computing systems. In ctm each principal (location) is equipped with a policy, which determines its legal behaviour, and with a protocol, which allows interactions between principals and the flow of information from principals to policies. We elect to formalise policies using a Datalog-like logic, and to express pr...

An implicit assumption of trust in the participants is at the basis of most Peer-toPeer (P2P) networks. However, in practice, not all participants are benign or cooperative. Identifying such peers is critical to the smooth and effective functioning of a P2P network. In this paper, we present the ROCQ mechanism, a reputation-based trust management system that computes the trustworthiness of peer...