Caesar Cipher + 1

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Full number of exact variations equals to 88! * 1000 * 2147483647 = 3.983209e+146, most of them are differs slightly.

Caesar Cipher +1 pros:

  1. N errors in input produce N errors of output
  2. Cipher is not sensitive to errors in input alphabet
  3. Cipher output is heavily dependent on IV

Caesar Cipher +1 cons:

  1. Luck of signature algorithm
  2. Small IV / easy to broute force
  3. Weak against differential attacks

It will support RC error correction, and can be used in conjunction with digital signatures (needs DC to protect from minor changes)

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