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Yet Another Challenge; Skill level: Medium
Topic Started: Sep 10 2005, 04:02 PM (735 Views)
Revelation
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[ *  *  *  *  * ]
Code:
 
ôðôùçóï÷öíÿÿ


Good luck! :D
RRRREJMEEEEEPVKLWENFNVJKEEEEEAOLKAFKLXCFZAASDJXZTTTTTTTLSIOWJXMOKLAFJNNKFNXN
RAGRBAQEMHIGDJVDSEOXVIYCELFHWLELJFIENXLRATALSJFSLCYTKLASJDKMHGOVOKAJDNMNUITN
RRRRLJVEEEEECLYVYHNVPFTAEEEEEMWLMEIRNGLARWJAKJDFLWNTIERJMIPQWOTZEOCXKNUBNXCN
RJIRPOWEANFUSNCZVDVZNMSFEKLOEPZLDKDJWSAAAAAAAOERHJCTNCKFRIMVKSOFOMKMANREWNBN
RZUDRGXEEEEENFQIDVLQNCKNEEEEEDGLLLLLLAWIOSNCDARLODMTOEJXMILDFJROTKJSDNLVCZNN
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Scryer
Just registered
[ * ]
Possible partial spoiler:
========== white stuff ============

The first five pairs are vailid Chinese ideographs. I don't
read Chinese, but Babelfish claims one of them is "yeast"
and another is "fodder".

I did a 256-alphabet Caesar with XOR, but that didn't yield
any insight.

=============end of white stuff=======
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Revelation
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This is normal english with the spaces removed. :)
RRRREJMEEEEEPVKLWENFNVJKEEEEEAOLKAFKLXCFZAASDJXZTTTTTTTLSIOWJXMOKLAFJNNKFNXN
RAGRBAQEMHIGDJVDSEOXVIYCELFHWLELJFIENXLRATALSJFSLCYTKLASJDKMHGOVOKAJDNMNUITN
RRRRLJVEEEEECLYVYHNVPFTAEEEEEMWLMEIRNGLARWJAKJDFLWNTIERJMIPQWOTZEOCXKNUBNXCN
RJIRPOWEANFUSNCZVDVZNMSFEKLOEPZLDKDJWSAAAAAAAOERHJCTNCKFRIMVKSOFOMKMANREWNBN
RZUDRGXEEEEENFQIDVLQNCKNEEEEEDGLLLLLLAWIOSNCDARLODMTOEJXMILDFJROTKJSDNLVCZNN
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Ok, I will give a hint:

SPOILER
******************
maybe the encryptions if offset-related
******************
END SPOILER
RRRREJMEEEEEPVKLWENFNVJKEEEEEAOLKAFKLXCFZAASDJXZTTTTTTTLSIOWJXMOKLAFJNNKFNXN
RAGRBAQEMHIGDJVDSEOXVIYCELFHWLELJFIENXLRATALSJFSLCYTKLASJDKMHGOVOKAJDNMNUITN
RRRRLJVEEEEECLYVYHNVPFTAEEEEEMWLMEIRNGLARWJAKJDFLWNTIERJMIPQWOTZEOCXKNUBNXCN
RJIRPOWEANFUSNCZVDVZNMSFEKLOEPZLDKDJWSAAAAAAAOERHJCTNCKFRIMVKSOFOMKMANREWNBN
RZUDRGXEEEEENFQIDVLQNCKNEEEEEDGLLLLLLAWIOSNCDARLODMTOEJXMILDFJROTKJSDNLVCZNN
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Revelation
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Should I post another hint? I really want someone to crack this :)
RRRREJMEEEEEPVKLWENFNVJKEEEEEAOLKAFKLXCFZAASDJXZTTTTTTTLSIOWJXMOKLAFJNNKFNXN
RAGRBAQEMHIGDJVDSEOXVIYCELFHWLELJFIENXLRATALSJFSLCYTKLASJDKMHGOVOKAJDNMNUITN
RRRRLJVEEEEECLYVYHNVPFTAEEEEEMWLMEIRNGLARWJAKJDFLWNTIERJMIPQWOTZEOCXKNUBNXCN
RJIRPOWEANFUSNCZVDVZNMSFEKLOEPZLDKDJWSAAAAAAAOERHJCTNCKFRIMVKSOFOMKMANREWNBN
RZUDRGXEEEEENFQIDVLQNCKNEEEEEDGLLLLLLAWIOSNCDARLODMTOEJXMILDFJROTKJSDNLVCZNN
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insecure
NSA worthy
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I was put off by the weird characters in the ciphertext, the dearth of available data, and the absence of an algorithm, so I haven't even looked at it in any detail. Sorry.
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Well, I can give you a hint then. The weird characters are just ascii, so that should indicate that some char value (ex. a=97) has been added to a constant value or a variable and that value gets set back to a letter. I gave you a hint about the offset being involved with the encryption.

so maybe it is something like this:

a (79) + constant (ex. 60) = ï (139). But I said the offset is calculated too!


EDIT Revelation: I am that guest :)
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Donald
NSA worthy
[ *  *  *  *  *  * ]
Despite several attempts, I'm just not finding the correct algorithm here (Even though I THINK I know what the plain text is) :)

So, could you give us a somewhat larger sample to work with?
And perhaps specify the hex (or decimal) values for each character?

Thanks!

Donald
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SPOILER
***************

Well, I already told you it was offset-related. So what if I used a constant shift number to add to every char and then add the offset to it? Or maybe the char is substracted from a constant number!!!

***************
END SPOILER

I don't think it will be that hard with this spoiler. :) Programming a tool to read the ordinal values of the characters is probably the easiest way to crack it.


EDIT: lol I forgot my own encryption. It took me an age to crack my own one :)
RRRREJMEEEEEPVKLWENFNVJKEEEEEAOLKAFKLXCFZAASDJXZTTTTTTTLSIOWJXMOKLAFJNNKFNXN
RAGRBAQEMHIGDJVDSEOXVIYCELFHWLELJFIENXLRATALSJFSLCYTKLASJDKMHGOVOKAJDNMNUITN
RRRRLJVEEEEECLYVYHNVPFTAEEEEEMWLMEIRNGLARWJAKJDFLWNTIERJMIPQWOTZEOCXKNUBNXCN
RJIRPOWEANFUSNCZVDVZNMSFEKLOEPZLDKDJWSAAAAAAAOERHJCTNCKFRIMVKSOFOMKMANREWNBN
RZUDRGXEEEEENFQIDVLQNCKNEEEEEDGLLLLLLAWIOSNCDARLODMTOEJXMILDFJROTKJSDNLVCZNN
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