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Challenge: CRYPT001


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#1 Ohm

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Posted 26 September 2009 - 11:08 AM

Here's something to get us started. This is not a difficult challenge, I really just wanted something to put here while I prepare something more interesting.

I've encrypted a secret message below. Decrypt it to complete the challenge.

NVGhpcyBpcyBteSBzZWNyZXQgbWVzc2FnZQo

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#2 DanielG

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Posted 26 September 2009 - 01:08 PM

Usually challenges like this have a hint in the form of a small (cryptic) accompanying text, or just a title as a hint.
Also, should we just solve this and post it here, or do we use some sort of [spoiler] tag to not spoil it for other people who want to solve it.

I haven't solved it yet but I think I'm baseing it on correct assumptions.

#3 Ohm

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Posted 26 September 2009 - 01:34 PM

OK, let's try a hint.

#4 Seal

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Posted 26 September 2009 - 01:53 PM

This is going to be fun. Thanks Ohm!

#5 Swerve

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Posted 26 September 2009 - 02:13 PM

OK, here is where I've got to:

Spoiler


If anyone has completed the challenge please feel free to give us a hint.

I don't think Ohm should be expected to help people who are stuck as he's done enough by creating these for us.

#6 DanielG

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Posted 26 September 2009 - 02:20 PM

Lol Swerve, that's how far I got without a hint, but he states we should "Decrypt it". So we're just halfway there.

#7 Ohm

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Posted 28 September 2009 - 11:06 AM

I've posted a second hint in the hints thread.

#8 zandi

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Posted 28 September 2009 - 10:38 PM

i'll get started on this asap, i need something other than schoolwork to focus on.

and maybe i'll get to toy around with some math, too.

#9 SchippStrich

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Posted 03 October 2009 - 05:53 AM

This is probably incredibly incorrect but are the first two characters: -R

In case you are wondering how the hell I got this, here is what I did;
I took each character from the ciphertext and found their corresponding decimal value.
I used this chart : http://email.about.c...se64enctabl.htm
I did this for 4 characters and calculated the six bit value for each.
001011 010101 001010 100001
After that I grouped the values into 3 byte groups.
00101101 01010010 10100001
And then I converted the bytes into their ASCII character equivalent.

I derived the idea from this: http://email.about.c...64_encoding.htm
The reason I did not try the third character is because I was getting this: í
So then I figured I was wrong.

Edited by schippystrich, 03 October 2009 - 06:13 AM.


#10 DanielG

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Posted 03 October 2009 - 01:01 PM

It really is simpler than you'd expect.

answer:
Spoiler

Edited by DanielG, 03 October 2009 - 01:06 PM.


#11 Ohm

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Posted 03 October 2009 - 03:20 PM

You got it :)

Spoiler


#12 SchippStrich

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Posted 06 October 2009 - 02:27 AM

So I kind of had the right idea?

#13 bcrscahh198987

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Posted 25 October 2009 - 07:39 AM

I thought you wanted somebody to write a code that will undo it.

But that's too much work.

#14 megabraker

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Posted 01 January 2011 - 09:06 AM

I had it 'this is my secret message' :rolleyes:




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