• Announcements

    • xper

      MSFN Sponsorship and AdBlockers!   07/10/2016

      Dear members, MSFN is made available via subscriptions, donations and advertising revenue. The use of ad-blocking software hurts the site. Please disable ad-blocking software or set an exception for MSFN. Alternatively, become a site sponsor and ads will be disabled automatically and by subscribing you get other sponsor benefits.
Sign in to follow this  
Followers 0
Tripredacus

Cryptanalysis?

5 posts in this topic

Do you like those movies where the characters have to figure out some kind of code in order to solve some mystery or get some place? Well those types of code exist in real life, but sometimes they can be nearly impossible to figure out. Want to give it a try for yourself? Well there is an unsolved murder case where the victim had "encoded" notes in his pocket. Its been over 10 years and still no one knows how to decipher them.

I gave it a shot, and ended up with a headache. Sure I can see patterns in there but can't make heads or tails of it. The victim was said to have come up with this technique when he was a child and authorities are hoping that if they are deciphered, then they can get a glimpse into his past just days before he was found, or maybe even identify a suspect.

You can see these two notes here:

http://www.fbi.gov/news/stories/2011/march/cryptanalysis_032911/image/gallery

Note: some members outside of the US may or may not be able to go to this website.

:ph34r:

0

Share this post


Link to post
Share on other sites

The headache part for me is deciphering that writing. Other than that, for a simple letter substitution (which is what it would about have to be for someone to write that without the aid of computing machinery), I'm surprised that it hasn't been cracked. Worse come to worse, there isn't that much text there that wouldn't eliminate a brute force solution (substitute letters, write to text, then look at text to see if its intelligible). In a way, though, if they're going to ask the public this it would be nice to know what they HAVE tried.

0

Share this post


Link to post
Share on other sites

That's true, but wouldn't that be a bad idea? Would the FBI really want people to know all the techniques they use for code breaking? Probably not. I am going to guess that they tried all the applicable types on the wikipedia page for cryptanalysis, plus probably some techniques that no one knows about.

0

Share this post


Link to post
Share on other sites

That's true, but wouldn't that be a bad idea? Would the FBI really want people to know all the techniques they use for code breaking? Probably not. I am going to guess that they tried all the applicable types on the wikipedia page for cryptanalysis, plus probably some techniques that no one knows about.

Yeah, you could say that. I really find it all strange. You'd think they'd have the smartest/most knowledgeable people in this area and would have the best ideas already tried instead of putting it out to a public that is arguably even less knowledgeable than they are. Besides, we don't even know if it's just a bunch of random letters that this person started writing on notes just to mess with people. As far as we know, this person might be having a big laugh now with people thinking that it is actually anything.

Hard to know for sure.

0

Share this post


Link to post
Share on other sites


Yeah, you'd think they would have recovered more than just 2 examples of code -

what about left impressions from the guys notepad/papers/book covers in his

residence?

They also COULD HAVE removed the recovered fingerprints that obscure the

lettering!, & give out basic information such as;

- left or right handed, can handwriting experts say if he was printing across from

left or right, and from up or down, do impressions show which of these notes

was filled out 1st (or one folded & concurrently overlaying the other -on this point

I mean that multiple straight definite folds in 1st paper would indicate that part of

each page was simultaneously referred to and concurrently transcribed by the guy

-to give a 'two part


' code i.e. part of both pages contain the encoded whole

of a single encoded message - if this is the case, would also explain why the 2nd

page is clearly divided by borders [?each border=one separate msg/note?] ).

To me most importantly where initially he started writing from!

If you had that start point, you could follow along the printing, trying to figure as

you go -after all, the guy had to be thinking hard as he wrote the code.

[Admittedly, it looks like it starts from left due to left justification of margin of paras

& writing is non justified on right side of lines.]

I think maybe one note is 'T' heavy?, so perhaps he was tossing in false lettering

(filler) as he went. (Handwriting experts should be able to form a view if certain

often repeated letters appear 'thinner', which could indicate (quicker?)writing as

'toss it in' filler, compared to thicker lettering, more carefully printed, maybe more

likely to be code. Thinner lettering you 'might' assume may be more easily

printed - & if its only a 'tossed in filler' character/symbol, you'd think he wouldn't

waste time making filler from more elaborate characters, not consistently anyway.)

-Also, note the 'close bracket' symbol [see printed on your 'zero' key on an english

physical keyboard] may actually be an integral part of the code - notice how the

guy takes the time to correct his outlined border on the 2nd page with a definite

straight down stroke, overwriting that bulge in the border that 'could' have been

misinterpreted by him on readback as an additional 'close bracket' symbol.

-A HIGHER base resolution pic can be viewed on the wiki page - unfortunately

still with the recovered fingerprinting marking still obscuring it partly.

Cheers

Edited by buyerninety
0

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0

  • Recently Browsing   0 members

    No registered users viewing this page.