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Publications: Abstract

Generalized Indistinguishability

Ueli Maurer and Renato Renner

Indistinguishability between systems is a basic concept in cryptography, allowing for a generic type of security proofs. Its scope of application is however restricted to systems whose behavior depends on some secret randomness. We propose a generalized definition of indistinguishability which overcomes this restriction, such that the same type of security proofs applies in a more general context where this randomness might be public.