MR.HAANDI's Spvm 2
| Download spvm_2_keygenme.zip, 6 kb (password: crackmes.de) Browse contents of spvm_2_keygenme.zip Like the first Spvm keygenme: clean code, some math.
Difficulty: 6 - Hard, for very professionals only | Send a message to MR.HAANDI » View profile of MR.HAANDI » |
Solutions
Solution by divinomas, published 24. oct, 2008; download (1 kb), password: crackmes.de or browse.
divinomas has rated this crackme as quite nice.
Discussion and comments
| andrewl.us Moderator 04. Oct 2008 | Who said you could give up on SDDecoder and make cool crackmes instead? :> |
|---|---|
| divinomas 22. Oct 2008 | So how about spvm 2,i guess it is something about integration ;) |
| indomit 23. Oct 2008 | I tried this one. Found integral as $[0,x] exp(10000*pi*pi*x*dx)*f(x)dx = pi/(1-dx*dx*big_number) Not sure this right, but any case it is to hard for me to found function f(x) :( |
| divinomas 23. Oct 2008 | @indomit:Here is some interesting tricks.dx has two roles,one acts like a infinitesimal,another as a constant.Take the exponent (10000*pi*pi*x*dx)=-s to get dx=fun(s) then substitute the dx in the right,you can get the laplace transformed F(s) just use reversed laplace transformation to get f |
| divinomas 23. Oct 2008 | sorry it should be (10000*pi*pi*dx)=-s |
| indomit 24. Oct 2008 | divinomas, thank you very much! I found this damn function! It was so easy after your advice. =) |
| indomit 24. Oct 2008 | And found signature now! It was nice :) P.S. I think divinomas has already sent the solution, or soon will do this, so I didn't make sense :) |
| Ox87k 24. Oct 2008 | two solutions are better than one so indomit, please, write you own.. |
You may leave your comment, thoughts and discuss this crackme with other reversers here.
Acting childish will not be tolerated.
HTML and such will be left as-is, so don't try.