Affine code is a replacement password. It is a letter of a letter. It is the encryption function <math> e (x) = ax+ b \ pmod </math> , Which <math> a </math> And <math> m </math> Coprime. <math> m </math> Is the number of letters. Decoding function is <math> d (x) = a ^ (xb) \ pmod </math> , Which <math> a ^ </math> Yes <math> a </math> At <math> \ mathbb_ </math> Group inverse of multiplication.

affine
......\affine.vbp
......\affine.vbw
......\Form1.frm

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