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A primitive or protocol with provable security is accompanied by a mathematical proof that shows how to reduce the security claims about the protocol to a set of assumptions.

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Constructing a mac scheme secure to regular definition but insecure to special case

The mac-forge security game for mac schemes looks like this: $k \leftarrow \operatorname{Gen}(1^n)$; $(m,t) \leftarrow A^{\operatorname{MAC}_k(⋅)}(1^n)$; Let $Q$ denote the set of all queries that $A …
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