[_j_]'s PALLAs
| Download pallas.kgnme.j.zip, 34 kb (password: crackmes.de) Browse contents of pallas.kgnme.j.zip It was put together kind of quickly, keygen it anyway you want.
Difficulty: 3 - Getting harder | Send a message to [_j_] » View profile of [_j_] » |
Solutions
Solution by cyclops, published 28. oct, 2007; download (70 kb), password: crackmes.de or browse.
cyclops has not rated this crackme yet.
Discussion and comments
| SaXoN 20. Aug 2006 | Nice... Good to see crackmes on a sunday too, i dont see that so often :D |
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| geeko 23. Aug 2006 | just a patch at addr 4027e0 change 75 to 74 and any key is working (as your proggy sais) ! ?!? |
| zairon Moderator 23. Aug 2006 | No geeko, you have to keygen it... :p |
| geeko 24. Aug 2006 | I am too lazy to reverse an encription routine, since there is a simpler way to crack |
| [_j_] Author 24. Aug 2006 | Reversing it should be pretty simple too :P Patch is not a valid solution, the protection is designed around keygeneration, not against modification. |
| cyclops Moderator 25. Aug 2006 | Its doing some *big* num calc using Miracl..... I wil try if i got some time.... |
| jB_ 29. Aug 2006 | This idea has already been used by Amenesia for his great opensource keygenmes. It is a pity that you use it without bringing anything new, and that the RSA problem can be solved using bruteforce only (no need for a better attack). |
| [_j_] Author 01. Sep 2006 | I didn't realise there were open source crackmes using the exact same scheme, like i said this was put together really quickly and I'll admit the idea isn't really a new one. Try my harder crackmes for what I'd like to consider my own original ideas :) |
| mindless 07. Nov 2007 | I just solved it and I liked it... However I don't get why the author didn't use a standard algorithm for the hash function but modified the SHA1 one. Anyway I understood much better the low exponents problems in RSA, and the wiener attack. @jB: how could you break this crackme by bruteforcing? what would you exactly bruteforce? Thanks! |
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