[infostudents] DAS Aufgabe 1

  • From: Niklas Goby <niklasgoby@xxxxxx>
  • To: infostudents@xxxxxxxxxxxxx
  • Date: Fri, 22 Jun 2007 12:26:49 +0200

a) mein k = 5
b) l = 77
192 = 5 * 38 +2 5 = 2*2 +1 
         2 = 2*1

         ==>     a = 38 * b +2
                     2 = a - 38*b
                     1 = b - 2(a -38b)
                     1 = 77b - 2a
      ==> l = 77

c) H = 08 = 8    I = 09 = 9           ==> HI = 89
89^5 mod 221 s := 72 

   entschlüssle 87 =: d
87^77 mod 221 d := 18 5 ==> R E

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