A provably secure biometrics-based authenticated key agreement scheme for multi-server environments

An authentication scheme handling multiple servers offers a feasible environment to users to conveniently access the rightful services from various servers using one-time registration. The practical realization of distribution of online services efficiently and transparently in multiple-server systems has come true by virtue of multi-server user authentication schemes. Due to distinguished properties like, difficulty to forge or copy, in-feasibility to lose or guess or forget, etc., biometrics have been widely preferred as a third authenticating factor in password and smart card based user authentication protocols. In this paper, we design a new biometrics-based multi-server authentication scheme based on trusted multiple-servers. We harness the concept of fuzzy extractor to provide the proper matching of biometric patterns. We evaluate our scheme through informal discussions on performance and also using Burrows-Abadi-Needham logic (BAN-logic) & random oracle model for formal security analysis. We also compose a comparative assessment of our scheme and the related ones. Outcome of the analysis and assessment shows our scheme an edge above many related and contemporary schemes.