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Cover Quote: May 2016
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A key intellectual contribution of modern cryptography has been the recognition that formal definitions of security are an essential first step in the design of any cryptographic primitive or protocol. The reason, in retrospect, is simple: if you don’t know what it is you are trying to achieve, how can you hope to know when you have achieved it? ... [C]ryptographic definitions of security are quite strong and—at first glance—may appear impossible to achieve. One of the most amazing aspects of cryptography is that efficient constructions satisfying such strong definitions can be proven to exist (under rather mild assumptions).
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- J. Katz & Y. Lindell
Introduction to Modern Cryptography (2nd ed.), 2015
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