What is the difference between Diffusion and Confusion?

              In Diffusion the statistical structure of the plaintext is dissipated into long range statistics of the cipher text. This is achieved by having each plaintext digit affect the value of many cipher text digits. Which is equivalent to saying that each cipher text digit is affected by many plaintext digits.
             Confusion seeks to make a relationship between the statistics of the cipher text and the value of the encryption key as complex as possible. Thus even if the attacker can get some handle on the statistics of the cipher text, the way in which the key was used to produce that cipher text is so complex as to make it difficult to deduce the key.


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