Auth-SL - A System for the Specification and Enforcement of Quality-Based Authentication Policies

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Executive Summary

In this paper, the authors develop a language and a reference architecture supporting the management and enforcement of authentication policies. Such language directly supports multi-factor authentication and the high level specification of authentication factors, in terms of conditions against the features of the various authentication mechanisms and modules. In addition the language supports a rich set of constraints; by using these constraints, one can specify for example that a subject must be authenticated by two credentials issued by different authorities.

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