In this study, various functions that are required in an immersive shared virtual world were categorized into some groups such as sharing space, sharing users, sharing operations, sharing information and sharing time. Then the MVL Toolkit was developed to implement these functions. The MVL Toolkit contains several new technologies such as the stereo video avatar, the sharedtype database, the ce...

service oriented enterprises (soes) are subject to constant change and variation. in this paper, the changes are considered from an economic perspective based on service culture notion. once a change is implemented, the costs of some member services may increase, whereas the costs of some other services may reduce. we construct a game theoretic model trying to capture the possible conflicting i...

This paper studies the implementation of truth-telling in a repeated random matching prisoners’ dilemma where outcomes cannot be observed or verified by the public. It is well established that truthful information sharing can be a powerful device to overcome moral hazard problems. An equilibrium strategy can ask players to condition their behavior on this shared information, which creates stron...

When situation assessment is performed individually by cooperative, friendly agents working toward a commonly held goal, optimal strategies for sharing information are needed. The best strategies are often domain dependant with respect to constraints imposed by the domain itself. Appropriate strategies for information sharing can be selected by looking at the overall performance of a strategy b...

We present a new protocol to perform non-interactive verifiable secret redistribution (VSR) for secrets distributed with Shamir’s secret sharing scheme. We base our VSR protocol on Desmedt and Jajodia’s redistribution protocol for linear secret sharing schemes, which we specialize for Shamir’s scheme. We extend their redistribution protocol with Feldman’s non-interactive verifiable secret shari...

The ability of a long-lived seller to maintain and profit from a good reputation may induce her to provide high quality or effort despite short-run incentives to the contrary. This incentive remains in place with private monitoring, provided that buyers share their information. However, this assumption is unrealistic in environments where information sharing is costly or the beneficiaries of a ...

In modern cryptography, the secret sharing scheme is an important cryptographic primitive and it is used in various situations. In this paper, a timed-release secret sharing scheme (TR-SS) with information-theoretic security is first studied. TRSS is a secret sharing scheme with the property that participants more than a threshold number can reconstruct a secret by using their shares only when ...

Heterogeneous project groups today may be expected to use the mechanisms of the Web for sharing of information. Meta-data has been proposed as a mechanism for expressing semantics of information and hence facilitate information retrieval, understanding and use. This paper presents an approach to sharing of information which aims to use a semantic modeling language as the basis for expressing se...