|CraniX|'s CraniXsCrackMe#9
| Download cranixscrackme9.zip, 79 kb (password: crackmes.de) Browse contents of cranixscrackme9.zip Crack Algo / Make KeyGen + Read Readme
Difficulty: 4 - Needs special knowledge | Send a message to |CraniX| » View profile of |CraniX| » |
Solutions
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Discussion and comments
| MR.HAANDI 22. Jan 2009 | I have a feeling, that this "crackme" is not legal. It looks like the "author" copied the code from some real-life target. First, the abstract algorithm is a simple substitution/transposition symmetric cipher and is easily reversable (max level 4 and definitely not 9), if one understands it. But the implementation looks like the author uses the registers as high level language variables and did not write the algorithm itself (in that case the compiler would have produced a different output). Additionally the check whether the serial is valid is really weird, I think, no reverser who is smart enough to write this nice bijective map would check the serial in that way. (Wondering why noone has complained since 2003 ?) If you take a closer look at the rules you will notice some points proving my thought as well. For the mods: this is level 4, but if the author cannot prove that he wrote this algo and understands it, this, actually, should be deleted. |
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| Zero Moderator 22. Jan 2009 | This is one of the crackmes which have been migrated from the old website. IMO it is not sure that the author of this crackme will answer this question after 6 years :/ I set the level to 4 until somebody assures that it is really harder... can anybody proof the comments by MR.HAANDI ? |
| HMX0101 22. Jan 2009 | MR.HAANDI is right, this one isn't so hard and can be solved easily, and this one looks like a keygen for an real app... btw, if your guys don't notice it, all crackmes of cranix except this one were coded in VB ;) |
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