Try it here.
Challenge #14 - Find the right key of this rude program
#1
Posted 30 August 2011 - 12:29 AM
#2
Posted 30 August 2011 - 12:34 AM
#3
Posted 30 August 2011 - 12:42 AM
Because I made those challenges myself with the help of the MinGW compiler on Linux (the irony ) and they are my first Windows programs. The filesize is also very small (around 4kb), so it should be easier to find the solution than in a GUI based application, which has a lot of clutter.
#4
Posted 30 August 2011 - 12:58 AM
#5
Posted 30 August 2011 - 01:10 AM
#6
Posted 30 August 2011 - 01:12 AM
Nice idea to disclose the solution yet not announcing it publicly!!!The MD5 hash of the answer is ....................
#7
Posted 30 August 2011 - 04:21 AM
A limitation being that without someone quoting it, it can be edited and if someone posts the answer, I could be accused of changing to to match their answer. However until someone posts the answer, anyone having the answer can know that I have the answer... A shared secret.Nice idea to disclose the solution yet not announcing it publicly!!!
Hashes are nice for giving people confidence against tampering. I have a "card trick" program and usually ask Internet-based indulgers to take a hash of the program before starting. Even if they don't want the program at the moment, if they are impressed by it, they can verify that I didn't just customize the program to the parameters of their involvement, or that the program went out on the Internet to cheat. If they inspect the source code later on, they can have confidence that it was the same, throughout.
#8
Posted 30 August 2011 - 10:35 AM
It sounds the same way as "Digital Signature" works.Hashes are nice for giving people confidence against tampering. I have a "card trick" program and usually ask Internet-based indulgers to take a hash of the program before starting. Even if they don't want the program at the moment, if they are impressed by it, they can verify that I didn't just customize the program to the parameters of their involvement, or that the program went out on the Internet to cheat. If they inspect the source code later on, they can have confidence that it was the same, throughout.
#9
Posted 05 September 2011 - 11:02 AM
#10
Posted 05 September 2011 - 11:28 AM
The reason is explained here.(http://reboot.pro/15...post__p__136875)Is the site down? I can't seem to access it, it comes up with the hosting page for me.
#11
Posted 05 September 2011 - 12:06 PM
As often happens, OT , but JFYI :Because I made those challenges myself with the help of the MinGW compiler on Linux (the irony ) and they are my first Windows programs.
http://uncyclopedia....ki/Command_Line
(only a quick laugh, but I find it very well done)
Wonko
#12
Posted 05 September 2011 - 03:11 PM
Link to challenge site updated in first post.
#13
Posted 11 September 2011 - 01:22 PM
#14
Posted 11 September 2011 - 03:02 PM
#15
Posted 11 September 2011 - 03:15 PM
Looking at the executable with a hexeditor first might reveal something interesting.I had a try last night but failed. Do you have a clue to give, like how many instructions to change etc?
IDA pro might be handy too. The free version can be found at:
http://www.hex-rays....ownfreeware.htm
#16
Posted 11 September 2011 - 09:46 PM
Yields that the MD5 hash of the answer is 924015BBE4ADF3781648AB98211A365D
To be the hash of the key (and not the executable). I never tried the key online, just compared against the wrong md5..
IDA is definetely good. Love it.
#17
Posted 12 September 2011 - 12:48 AM
Have you tried your solution in the challenge site? If not, then please login there with your reboot username & try out the challenge to help us keep track of the participants who have successfully solved the challenge.
#18
Posted 12 September 2011 - 05:23 AM
1 user(s) are reading this topic
0 members, 1 guests, 0 anonymous users