• Journal of KIISE:Computer Systems and Theory
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• v.35 no.9_10
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• pp.441-451
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• 2008

Currently, the X.509 proxy certificate is widely used to delegate an entity's right to another entity in the computational grid environment. However it has two drawbacks: the potential security threat caused by intraceability of a delegation chain and the inefficiency caused by an interactive communication between the right grantor and the right grantee on the delegation protocol. To address these problems for computational grids, we propose a new delegation protocol without additional cost. We use an ID-based key generation technique to generate a proxy private key which is a means to exercise the delegated signing right. By applying the ID-based key generation technique, the proposed protocol has the delegation traceability and the non-interactive delegation property. Since the right delegation occurs massively in the computational grid environment, our protocol can contribute the security enhancement by providing the delegation traceability and the efficiency enhancement by reducing the inter-domain communication cost.

• Journal of Internet Computing and Services
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• v.13 no.6
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• pp.55-62
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• 2012

Grid web applications by standard Web technology are increasingly used to provide grid service to users as normal Web user interface and service. It is however difficult to integrate a grid security system such as Grid Security Infrastructure (GSI) into Web applications because the delegation way of standard Web security is not the same as the one of Grid security. This can be solved by allowing Web applications to get a Grid credential by using an online credential repository system such as MyProxy. In this paper, we investigate the problem that occurs when MyProxy, which assumes mutual trust between a user and Grid web application, is adapted for achieving security integration between Web and Grid, and we propose a new Grid proxy delegation service to delegate a Grid credential to the Web without assuming mutual trust. In the service, the X.509 proxy delegation process is added to OAuth protocol for credential exchange, and authentication can be done by an external service such as OpenID. So, users can login onto the Grid web application in a single sign-on manner, and are allowed to securely delegate and retrieve multiple credentials for one or more Virtual Organizations.