The design, development and application of a proxy credential auditing infrastructure for collaborative research

Single sign-on and delegation of privileges are fundamental tenets upon which e-Infrastructures and Grid-based research more generally have been based. The realisation of single sign-on and delegation of privileges in accessing resources such as the UK e-Science National Grid Service is typically facilitated by X.509-based Public Key Infrastructures (PKI) and exploitation of proxy certificates. This model can be categorised by authentication-oriented access and usage of resources. It is the case however that proxy certificates, can potentially be obtained and abused by a malicious third party without the knowledge of the holder. In this paper we describe a novel proxy auditing solution that addresses this issue directly. We describe the design and implementation of this solution and illustrate its application in widely distributed and heterogeneous research environments