# What is it meant by a “hybrid argument”?

Can anyone explain (or point to a reference for) what a hybrid argument is in a security proof, and when it's convenient or preferable to use it?

Among some of the places where I've seen it mentioned, there is the paper Boneh, Sahai, Waters - Functional Encryption: Definitions and Challenges. The term standard hybrid argument is mentioned in the proof sketch of Theorem 1 within section 4.1.

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could you give me this paper to look at? –  T.B Sep 6 '13 at 14:18