View Full Version : Frivolous board modifications + Crypto challenge

November 24th, 2007, 15:54
Hi All,

Apparently having nothing better to do with my time, I created several new bbcodes that can be used when posting replies. You will notice 5 new icons in the Thread Reply box that can be used to select the appropriate bbcode. In order:

I hate love my boss - I hate love my boss

H2O - H2O

e=mc2 - e=mc2

Background Color:

When you click the icon (ABC on a white background) vBulletin will ask
"Please enter the option for your BGCOLOR tag:"
Enter here either a standard named color or an html format color.


yellow - yellow
red - red
funky blue - funky blue

PLEASE use this bbcode tag responsibly!
It will be revoked if we start getting huge blocks of colored background text for no good reason, or complaints from members throwing up all over their keyboard by having to look at pukey colors.
However, it might be very useful for highlighting important parts in code, etc.

Spoiler Code with Hide/Show Button:

This might be fun and useful for challenges or crackme solutions. The reply icon is the "Hide" cartoon button, paste the text you want to hide between the tags. Any other bbcode tags can be contained within the spoiler tags. To see the hidden text simply click on the SPOILER button that is created.

hidden text here


Now you can see the text

For another example see the next post...


November 24th, 2007, 15:54
So, if I was to say that the following encrypted text was based on a Railfence Cipher (3 rails, 0 offset, W-shaped), then you could easily figure it out without looking at the answer.

RMao'eunC esgbadsRgopetEser rm

You don't really want to look before trying it do you?

All right, here's a hint:
The Railfence Cipher is read from top to bottom then back to the top again in a "W" shaped pattern. In this case you've already been told there are 3 rows or "rails" and the reading begins on the first rail (offset = 0).

There are 30 characters including spaces in the encrypted text.
Try mapping out how 30 characters would look spaced out in a "W" pattern of 3 rows and you should get a distribution of how many characters are in each row.

To make things easier set your text editor (if not doing it on paper) to a fixed width font such as Courier.

The pattern you get should look like this:


1 1 1 1 1 1 1 1
2 2 2 2 2 2 2 2 2 2 2 2 2 2 2
3 3 3 3 3 3 3

Transposing the encrypted text onto this pattern yields the solution:


R M a o ' e u n
C e s g b a d s R g o p e t
E s e r r m

RCE Messageboard's Regroupment

November 24th, 2007, 16:36
Haha, I think we need to prohibit recursive misuse of spoiler blocks too.

(jokes aside, very nice work, of course :yay

November 24th, 2007, 17:35
Great work, as always Kayaker!


November 24th, 2007, 19:50

It seems that the css for bgcolor isn't sanitized (enough).

November 24th, 2007, 20:15
I dont like it .


November 24th, 2007, 20:39
Easily fixed.