Semusa Modified Cipher

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Problem Description Semusa assigned numbers to the English alphabets in consecutive order as A-1, B-2, C-3........Z-26 to encrypt a message given in string of letters. He developed a very unique cryptosystem which required an authentication text every time a user want it to use it to transit information securely. The authentication text was developed on a mathematical series and the cryptosyste

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solution.cppC++17

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