NeoN's 192bits
| Download 192bits.zip, 2 kb (password: crackmes.de) Browse contents of 192bits.zip In this crack me need find a valid pair - name and serial. Accepted only pair or keygen. No patching allowed.
Difficulty: 3 - Getting harder | RatingWaiting for at least 3 votes View profile of NeoN » |
Solutions
Solution by andrewl.us, published 23. sep, 2007; download (154 kb), password: crackmes.de or browse.
andrewl.us has rated this crackme as quite nice.
Discussion and comments
| ChupaChu 02. Sep 2007 | I have basicaly got the idea how it works but havin problems with big and small endians, coz i cant code in asm ;) Anyway it is very nice keygenme, NeoN ! Regards, ChupaChu! |
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| ChupaChu 02. Sep 2007 | - no name will work with: 69BD9218A741EC6EED2970D272EFF8C4C3DDBF638F3FC8B0 and all zeros of course ;) |
| NeoN Author 03. Sep 2007 | Good work with "no name" :) But, i expected some name in serial. This crackme is only demonstration, and "all zero" can contain special signatures, license type, etc. Anyway, never mind it, nice work ChupaChu :) |
| NeoN Author 09. Sep 2007 | Anyone else cracked it? I think it's harder than "3 - Getting harder", inho. |
| Stardust 22. Sep 2007 | I have removed all obfusicated code and can see the "real algo". In my opinion it is a RSA-Algo with 192 bits. If the challenge is to calculate the correct serial to a given name, the number ChupaChu shows is the n which must be factorized to solve the problem. Is it possible to factorize such a great number in two primes with standard PC's ? I'm not sure, so I must capitulate at this point. Nice keygenme, NeoN, but it is too hard for me. :( Regards, Stardust |
| bLaCk-eye Moderator 22. Sep 2007 | 192bit can be done in ~ 1 min on an ordinary computer.Go get cracking. This could be useful: http://www.boo.net/~jasonp/qs.html Have fun. |
| Stardust 22. Sep 2007 | Thank you bLaCk-eye for the tip. It took 12 seconds on my PC to get the two 29 digits prime out of the n, with this "msieve-tool". I thought factoring is a harder job for a PC, now I'm wiser. I think now it's my turn to write a keygen. :-) |
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