C. Complexity Theory and Cryptography

C.1Introduction
C.2Provably Difficult Computational Problems Are not Suitable
C.3One-way Functions and the Complexity Class UP

. . . complexity turns out to be most elusive precisely where it would be most welcome.

—C. H. Papadimitriou [229]

Real knowledge is to know the extent of one’s ignorance.

—Confucius

The complex develops out of the simple.

—Colin Wilson

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