Challenge #8 - Human can't see with naked eyes, but Robots can
#1
Posted 28 July 2011 - 12:57 PM
#2
Posted 28 July 2011 - 01:37 PM
I found it very fast. Probably, I had a lucky day.This is an unsolved challenge from dCTF 2011. So, I don't know the solution. You try & share with us.
The answer is:
How to solve:
Step 1:
Step 2:
Step 3:
View end result:
#3
Posted 28 July 2011 - 02:23 PM
We tried with 3.14 (and more digits) > not accepted.
We tried with "Circle number" and similar > not accepted.
But maybe this helps, when the TEAM works on it:
When you floodfill the black and the red areas with white, about 20 red pixels remain.
I have no opinion about them. Maybe somebody else ...
Peter
#4
Posted 28 July 2011 - 04:41 PM
Sorry, I had to mention those additional trial & errors that we have already faced as mentioned by pscEx.I found it very fast. Probably, I had a lucky day.
BTW, can anyone explain me the fact that we I I open the PNG in Microsoft Office Picture Manager or Picassa, I can see nothing. But, the PI symbol is visible is the file is opened in MSPaint or applied Paint.Net's Steganography plugin on it.
#5
Posted 28 July 2011 - 06:09 PM
Did you try with the same number of digits as there are points (33 if I counted them right)?We tried with 3.14 (and more digits) > not accepted.
33 digits in total or 33 digits after the decimal point.
#6
Posted 28 July 2011 - 06:41 PM
Wonko
#7
Posted 29 July 2011 - 02:45 PM
Interesting!Did you try with the same number of digits as there are points (33 if I counted them right)?
33 digits in total or 33 digits after the decimal point.
A different idea: What about "Code is 33"?
Is there still any possibility to check the correct code input?
Peter
#8
Posted 29 July 2011 - 02:47 PM
Hey peeps, take a break and get some pie
Spoiler
Wonko
Peter
#9
Posted 29 July 2011 - 04:41 PM
Do u spend half the time of the day to find images to put in spoilers?Hey peeps, take a break and get some pie
Spoiler
#10
Posted 29 July 2011 - 05:17 PM
Naah, only a few minutes (I'm pretty fast you know ... )Do u spend half the time of the day to find images to put in spoilers?
Apropos :
Wonko
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