Supose that  : C

 

      Public key (e, n ) = (7, 15)

 

 

      Private key (d,n )= (15, 15)

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Encrypt :

      For example M = 12

      Calculate D = 12^7 ( mod 15 = 3

      Letter encrypted D =  3

Decrypt :

      3^15 ( mod 15 = 12     M =  12

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