Introduction to Basic Cryptography: Modern Cryptography

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Thx a lot dr.ryan , this video helps me to pass my exam.

Arthur-ibkq
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Fantastic video! I am doing a project at school (I live in England) called an EPQ (Extended project Qualification). My question is: Is Alan Turing the Father of Modern Cryptanalysis? Do you know of any other mathematician or Cryptographers that could own this title other than Turing? If so why? I would really appreciate it if you could help me out! thank you!:)

SouthMarlet
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I notice that the method used is one letter to one letter. If we use a few letters and the cyber code is one letter, can it be done? Say, they is 4 letters. But, we replace it with A, and so on. Which means, cryptography is using a random code, either a word in 2 letters or 3 letters or, a letter to to letter, interchangeable. Of course, there must be a corresponding decrepit in order to decipher.

rodyklim