Titlebook: Cryptography; Simon Rubinstein-Salzedo Textbook 2018 Springer Nature Switzerland AG 2018 Cryptography.ciphers.cryptanalysis.publickey cryp

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A First Look at Number Theory,r, we will see a few very ancient theorems and techniques in number theory, going back to ancient Greece. Some of the theorems and proofs here were already included in Euclid ’s .?[Euc02], surely the most read math book in history. Later, we will return to number theory and look at more recent advances, going up?to the 21st century.

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,The Diffie–Hellman Key Exchange and the Discrete Logarithm Problem,n, and some of which only Alice knows or only Bob knows. The point is that knowing all the public pieces and at least one of the private pieces makes it easy to construct the key, but without knowing any of the private pieces, working out the key is extremely difficult (but possible in some sense). Here is how it works.

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