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[CrackMe] CrackMe v1.1


Greedy_Fly

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0x8166F372 == 2171007858 dec

0x16F0599C == 384850332  dec

 

equations to solve to get a point of start  :2171007858 - 3x == y
4y - 3x == 384850332

 

where

y == value of the middel 8 digits

x == Value of first 8 digitswe transform the equations so that  variables are on the one side and on the other the valueso our equation become

 

- 3 * x - y == - 2171007858 (dont forget the sign) !
- 3 * x + 4 * y == 384850332By dividing the first Equation by -3 , we eliminate the factor before x :
            

 x + 1/3 * y == 723669286
              

- 3 * x + 4 * y == 384850332With the first Equation, which is in all other equation of the summand eliminated by x.For the second Equation, we add 3 times the 1 Equation :x + 1/3 * y == 7236692865 * y == 2555858190Dividing the second Equation by 5, the factor in front of y is eliminated :x + 1/3 * y == 723669286y == 511171638With the second Equation is eliminated in all other equation of the summand with y .To finish the first Equation we subtract y/3 from first equation

 

so that the result is:
 

x == 553278740 => 0x20FA5D14 y == 511171638 => 0x1E77DC36

 

-------------------------------------------------------------------------

 

So, the rest of the crackme should be simple, in fact what remains is simple math

I dont want to spoil out the full solution, while with those infos should everyone be able to calculate the final key

 

And no bruteforcing is needed :punk:

 

sorry for my poor english i use a translator.

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