downloadbrowsew02057's CrackMe#3 by w02057

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To complete this crackme, you must find out how the algorithm works, then write a keygen :)

This is a more interesting type of crackme compared to my others, as I have based it on cryptographic puzzles to make it more interesting for you guys!


1) No patching
2) No bruteforcing
3) Write a keygen and submit it with a tutorial
4) Possibly write up how the algorithm works!

Good luck and enjoy

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 27. May, 2008
Downloads: 517


Votes: 3
Crackme is nothing special.

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Solution by born2c0de, published 03. jun, 2008; download (39 kb), password: or browse.

born2c0de has rated this crackme as quite nice.

Solution by bikers80, published 03. jun, 2008; download (35 kb), password: or browse.

bikers80 has rated this crackme as quite nice.

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Discussion and comments

02. Jun 2008
eh! tell me how many "numbers" are there in the md5 of ur productId.
02. Jun 2008
Solved it. Keygen written.
Writing tutorial and sending in a few minutes.

Great work w02057!!
Kudos to you.

@w02057: You really didn't need to give out the Concat(md5(prodid,username)) info. It was clear from the listing.
02. Jun 2008
Solution submitted.
I took more time because I have written a very-high detailed tutorial.

The Keygen also generates Multiple serial numbers.

Waiting for moderator approval.

Thanks w02057. Nice work.
02. Jun 2008
Great work born2c0de, I look forward to seeing it!

Yea, the algorithm is a bit buggy, as there are multiple combinations of serial number for the same name, and that honestly wasn't the intention :-)

Ive got a great idea for CrackMe#5, so stay tuned....
03. Jun 2008
nope man! thats the problem. the id generated has 22 numbers :( . the only time i got a 12 number id was when i put "," as my name lol. looking forward to the keygen but it sdnot work on my system unless i put my name as "," lol........................
03. Jun 2008
Thanks to born2c0de and bikers80 for your great tutorials and keygens, I found them great to read!

Stay tuned for my next crackme...
03. Jun 2008
Dim random = Label1
random.Text = "2681194357"
this is found where? it's what has held me up
03. Jun 2008
oops right in front of my unobservant face lol
04. Jun 2008
Yea sorry obnoxious, I didn't handle that part of the getid() function very well!

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