8. Quantum Computation and Cryptography

8.1Introduction
8.2Quantum Computation
8.3Quantum Cryptography
8.4Quantum Cryptanalysis
 Chapter Summary
 Sugestions for Further Reading

Our best theories are not only truer than common sense, they make far more sense than common sense does.

—David Deutsch [76]

One can be a masterful practitioner of computer science without having the foggiest notion of what a transistor is, not to mention how it works.

—N. David Mermin [197]

But suppose I could buy a truly powerful quantum computer off the shelf today — what would I do with it? I don’t know, but it appears that I will have plenty of time to think about it!

—John Preskill [243]

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