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As the existing trust model is not suitable for the semi-distributed mobile P2P network, a dynamic trust model based on super node SDTM is presented. Trust relation is categorized into two kinds: ordinary node and ordinary node, super node and super node, and each solution for the two kinds is put forward. Meanwhile, SDTM solves the problem of the ordinary node dishonest feedback using direct trust...
Most network applications such as pervasive computing, grid computing, P2P etc. can be viewed as multi-agent systems which are open, anonymous and dynamic in nature. Due to such nature multi-agent systems present potential threats in ensuring secured communication. One of the key feasible ways to minimize threats is to evaluate the trust and reputation of the interacting agents. Many trust models...
The goal of federated identity management is to allow principals, such as identities and attributes, to be shared across trust boundaries based on established policies. Since current Single Sign-On (SSO) mechanism excessively relies on the specifications of Circle of Trust (CoT), the need for service collaboration from different domains is being addressed on CoT. For the motivating issue of the cross-domain...
Context is important situational details, yet poorly utilized in interactive computing. The fact is that it can have impact on the trust decision to make. Motivated by that, we discuss and formalize functions of dynamic trust computation model based on context-aware in P2P environments. We firstly present the definition of context-aware and trust, and then give the trust computation including directed...
At present, more and more people use the Internet to transact. In order to be successful transactions, it is need to establish a certain trust relationship between people In order to manage the trust relationship, trust model have been proposed. Based on the past trust model, a Dynamic Trust Model based on Perceived Risk is given in the paper. The perceived risk is divided into six dimensions under...
Internet has become an excellent ecommerce platform for bringing together large numbers of buyers and sellers across wide geographic regions. Trust and reputation systems represent a. significant trend in decision support for Internet mediated service provision. However, most existing work assumes that all users have the same trust metrics, but in real life different users often have different preference...
Grid is the next generation of Internet, and it has attracted the attentions of research communities recently. In practical applications, the nodes in the grid domain need to transact with other strange nodes to acquire the services provided by those nodes. Recently, trust has been recognized as an important factor for Grid security. And it is important for them to make a trust evaluation for those...
The characteristics of uncertainty and variability in heterogeneous wireless network bring some new security challenges. This paper proposes a dynamic trust model based on entity credibility (DTMBC) to evaluate the trustworthiness of the network. The evaluation incorporates direct trust, recommended trust, credibility of the candidate network, credibility of the evaluating entity and time stamp. Direct...
The critical challenges for peer-to-peer (P2P) systems must be the task to manage risks in interacting with unknown peers. Reputation-based trust management can decrease this risk by evaluating trustworthiness of a certain peer from its historic behaviors. However, many existing trust models do not provide adequate reaction to quick changes in peers?? behavior, showing their ineffectiveness coping...
Security and privacy is a big problem that feazing computer researchers all along. In the pervasive computing, because the traditional methods of user authorization and access control are no longer adapted, the security and privacy becomes much more difficult to ensure. This paper proposes a dynamic trust model based on P2P. In this paper we call the trust model PDTM. The model adopts the technique...
A novel philosophy of secure mobile agent model which is based on trust model, risk evaluation and cryptography is proposed in this paper. Compared to current related research, our dynamic model can update in real time and is comprehensive for combining subjective and objective estimation. In addition, this model is broadly adaptive due to its flexibility. Trust and trust relationship are defined...
Computational GRID on ad-hoc networks allows users to benefit from heterogeneous resources independently of their location. Access to those resources should be highly secured. This paper presents two contributions to define and manage trust for GRID applications in ad-hoc networks. First, we define a dynamic trust model that enables to dynamically assign trust levels to nodes according to their behavior...
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