Formal models for security protocols often rely on assumptions not to be found in computational models. A first assumption is the perfect encryption one: encrypted data can not be manipulated in any way unless the decryption key is known. Another usual assumption is the free algebra one: only a few cryptographic primitives are considered in the model, and these must form a free algebra. We study these assumptions, and relax them to define more general models. We then define static analysis techniques for veryfing protocols secure in our models.
MODELS FOR CRYPTOGRAPHIC PROTOCOL ANALYSIS
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