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U.S. Army Guide to Code Breaking
sebFlyte writes "From the introduction of this document, the U.S. Army's field manual guide to Cryptanalysis: 'This manual presents the basic principles and techniques of cryptanalysts and their relation to cryptography. Cryptanalytics is the art and science of solving unknown codes and ciphers.'"
they found the cryptonomicon
turn up the jukebox and tell me a lie
...you know what they say about "military intelligence".
Private
Sergeant
Trolling is a art,
A sneak peek at chapter 7:
Solution of polygraphic substitution systems polyalphabetic substitution systems
and that's just the title. Pack a lunch for this one...
"As the intrepid kobold companion continues his journey, he begins to wonder... if priests raises dead, why anybody die?
Let's set them loose on Bill Gate's Doodle. It's worth an $800,000 Pentagon contract, init?
Don't blame Durga. I voted for Centauri.
Step 1. Build a quantum factoring computer
ok that was in jest. But seriously, how much good is a field manual going to do you when its possible for handheld computers to encrypt data to such a strong degree that it's theoretically impossible to decrypt with any likelihood of success that's indistinguishable from zero in the lifetime of the universe?
I mean even if the guys at the NSA use different theories from the rest of us, I can only imagine that the methods they use still require vast amounts of hardware...
I am disrespectful to dirt! Can you see that I am serious?!
Ejp fprdmy lmpe jpe yp ntrsl vpfrd?
If it moves, shoot it.
If it doesn't move, pick it up.
If you can't pick it up, paint it.
Unknown host pong.
FYI, pdf links are all f'cked up.
You should take a look at tracking down The Codebreakers which is a fasinating read.
"I use a Mac because I'm just better than you are."
The DISTRIBUTION RESTRICTION (see TOC) might result in UMICH being asked to kindly remove the document...although at this point it's probably mirrored and BTd to every nook and cranny of the internet.
It's an interesting book from an academic standpoint. I'm not sure how practical it is, though. It's all about cryptanalysis the old fashioned way (i.e. before computers). Still, I suppose it is good to acknowledge that the enemy may surprise us by taking a low-tech approach.
This has been on the /. front page for days, for those of us using the Boing Boing slashbox.
# cat
Damn, my RAM is full of llamas.
"B22 z1vs cb64 S c4m1o7 3 vt!!!"
An Indian-American Hindu committed to non-violent thought/speech/action alarmed by the global explosion of radical Islam
US Army Guide to Encryption:
Kill eve.
Above and beyond that is gravy - if some soldier who's MOS is not codebreaking wants to try when he isn't doing his MOS, great.
www.eFax.com are spammers
This field manual (no. 34.40.2) seems to have a Distribution Restriction placed on it as of March 5, 1990. The index page of the manual features a prominent warning about its restricted nature and a banner at the bottom of the page reads, "For Official Use Only".
Is this document classified or are these just standard warnings with no teeth? Is our dissemination of this 15-yr-old document criminal?
speaking from experiance of a military individual.. Army Cryptographers don't even read this manual ;)
The problem that I have is the fact that this manual appears to be publicly available.
It's an amusing conceit the many Americans have that the rest of the world is utterly incapable of figuring anything out on their own and must steal it from the USA.
It's simple: I demand prosecution for torture.
so people that find the ASVAB challenging are supposed to read and understand this? I sure hope there are some civilians in the mix somewhere.
grape - the GNU free, open source rape
Well, since it's years out of date, and only the most basic information, yes, I love the idea.
The best posts are both flamebait and informative.
posted with double-strength rot26 encryption!
Take THAT, US Army! Hahahahahah!!!
T35 85:
As a former Navy Cryptographer, it is disheartening to see this leaked anywhere, especially Slashdot. Even if there was a security failure that lead to the release of this document, it does not belong in the public domain. I implore the moderators to reconsider this topic. As Uncle Ben reminds us all... "With great power comes great responsibility."
The enryption techniques described in this manual are outdated. It doesn't touch the types of encryption that most of our "secrets" are protected by. Most of what is described is encryption/decryption that can be done by hand.
B O R I N G
Mortars are raining down. The stacatto of gunfire plays a constant ballad that would make even Robert Townshend say "Damn, that's loud". All of a sudden there is one of those deafening silences as everyone waits and reloads. One shout pierces the silence: "Hey Sarge? What's my password again?" ... And that son, is how the US Army's systems were compromised. Good night.
I'm hoping that this guide is not for the average grunt. You'd probably lose them at the title page :).
PS - This scenario also applies in loud bars when you lean over to your buddy to comment one of the female carbon units you find decent mating material.
"It's difficult to meditate on amphetamines." - Joe Walsh
I'm not sure how practical it is, though. It's all about cryptanalysis the old fashioned way (i.e. before computers). Still, I suppose it is good to acknowledge that the enemy may surprise us by taking a low-tech approach.
You mean if they surprise us by doing exactly the same thing we would have to do if the computers weren't available, right? You would be surprised how practical low-tech methods can be.
I want to drag this out as long as possible. Bring me my protractor.
Or the doodlings of a computer software billionaire.
"It's the height of ridiculousness to say for those 9 lines you get hundreds of millions."
What you do instead is keylog. Don't break the message, tap the recipient of the message and read it when they decrypt it.
Depending on the situation, you could also throw lots of bogus messages (ie: undecryptable) messages into the mix, leading the users to believe the system buggy (and thus ditch it).
That's more social engineering than crypto, but the point is to break the message. If they stop using the channel, then you hopefully have moved them to a weaker channel.
One-dimensional thinking is good, but it'll only get you from point A.
AKA rubber hose cryptanalysis?
My exception safety is -fno-exceptions.
if you drive 8 miles twice a day and save ~ a minute each time, and work 50 weeks out of the year you will conserve an entire workday (8.3 hours) in a year's time. True, you probably easily waste more than that on other meaningless prusuits (god knows i do). But waste not, want not huh...
DISTRIBUTION: Active Army, USAR, and ARNG: To be distributed in accordance with DA Form 12-11E, requirements for FM 34-40-2, Basic Cryptanalysts, (Qty rqr block no. 4607) and FM 34-3, Intelligence Analysis (Qty rqr block no, 1119).
I'm not sure if an army manual can be distributed openly like this. What exactly does DA Form 12-11E say about distribution of such manuals, can someone from the Army who knows the details explain the legal aspect?
In the COC (Combat Operations Center, center of confusion, or simply Circle of Cocksuckers), we had many little toys, ranging from Toshiba toughbooks to proxima projectors, etc. We used microwave relay to keep in touch with group and make sure our batallion commander was seeing the same operational picture that 1st FSSG was seeing.
That was all done via an electronically encrypted network. Which is fine and dandy when you have:
For forward units and combat units in the field the only thing they have that comes close is the field radio. While the encryption on these things is very advanced, the radio's are bullet, shock and explosion proof. Yes, the guy carrying your map, and perhaps a list of checkpoints might not be around forever. That is why field and forward units still have to employ non-electronic means of deciet and encryption. Even if it's as simple as one guy having the map, and the other guy having a clear piece of plastic with lines drawn on it.
If U.S. Marines and soldiers are still using "old fasioned" techniqies such as this, one could surmise that our enemies are doing the same.
Therefore, that old manual may have some relevance.
Be Safe! Sleep with a Marine. Semper Fi!
Right, because the Germans invented DES which started the rush of crypto algorithms while IBM (an American company) was still using polyalphabetic substitution cipers. No, wait, it's the other way around, stupid ass. You're not only wrong, but stupid.
One thing Capitalism does very well is foster innovation, both in invention and improvement of other inventions. We didn't invent the rocket, but we made it better. We invented the atomic bomb. We made serious cryptography. We invented the automobile and the cotton gin.
It's amusing to watch people go out of their way to try to find fault with the USA. History won't even bother recording you guys.
http://globalsecurity.org/military/library/policy/ army/fm/index.html
The end all be all of field manuals...although I didn't see the one on this topic there...oh well
Given that it's 15 years old and I don't see it on the Army's current list of FMs, I'm betting it's an old, superseded edition, safe for distribution.
the title of the book is encrypted anyways. Don't expect that the military intelligence will be able to break _that_
Wait... Military intelligence?!?
Your head a splode
Just make sure that you use a patented "Secret Bit" which tells that your message is not to be read by the enemy. Then encrypt it using some trivial method. Then send your message. If/when U.S Army reads your message, you can sue them under the DMCA and/or patent law.
When all the hands are waving and layers are swarming, walk directly to the white house.
For all you crossword-puzzlers and wordgames enthusiasts, Chapter 13 is a great tool to have, and an interesting study in and of itself.
Just for anyone who cares, this document is marked for official use only (FOUO) which means it contains sensitive material that should not be passed around (especially on /.). Though this is one of the lowest forms of classifications, it is still a classified document.
come on fhqwhgads
The parent post has the wrong link. It should be:/ army/fm/index.html
http://globalsecurity.org/military/library/policy
We already all about the Cryptonomicon here.
The enryption techniques described in this manual are outdated.
It is 15 years old.
Most of what is described is encryption/decryption that can be done by hand.
It's a FIELD manual.
Jason Lotito
...point them at an ocean.
-Moving and static.
-I can pick it up but I can't.
-And paint won't stick!
Oh, the humanity!
I find it very annoying that the file is broken up into seperate PDFs, is there a tool to combine several PDF files into one large file?
well germany is capitalist too...
The table of contents doesn't mention linear or differential cryptanalysis of a substitutation permutation network, and even if it did nobody is going to decrypt DES or AES on paper.
But in a place like Iraq, where power is unreliable and an endless supply of batteries for handhelds is not available, the enemy will have to rely on non-electronic cipher equipment.
Of course the problem in Iraq is that they don't use the English alphabet or language. The frequency analysis we depend on for the shift cipher or Vigenere cipher doesn't work for Arabic.
And even if they did, I really don't want to try and crack a Vigenere cipher without a computer!
I'm really good at code breaking. So good, I didn't realize you needed a manual for it. Heck, I can break any code in the world. They haven't made code yet that I can't break.
My secret? I find that randomly inserting punctuation will break just about any code...
*** *** You're just jealous 'cause the voices talk to me... ***
Actualy the automobile was either invented by Nicolas-Joseph Cugnot [source] (a Frenchman) or by Frederick William Lanchester [source](a Brit) depending on what you count as an "automobile"
While Ford's model T was certainly the first affordable auto, European models predate the Model-T by as much as 60 years. [source]
Killfile(TGK)
No trees were killed in the creation of this post. However, many electrons were inconvenienced.
Private: Sir! I found this, it may be a clue. "411 y0ur b4s3 4r3 b310ng t0 u$" Should I consult the field manual to cryptography?
Sargeant: What you say!
http://www.hollowdepth.com
If you are interested in how this stuff all works and came about in the first place, a really interesting book is "Between Silk and Cyanide" by Leo Marks.
It was a really great read...
Right, because the Germans invented DES which started the rush of crypto algorithms while IBM (an American company) was still using polyalphabetic substitution cipers. No, wait, it's the other way around, stupid ass. You're not only wrong, but stupid.
One thing Capitalism does very well is foster innovation, both in invention and improvement of other inventions. We didn't invent the rocket, but we made it better. We invented the atomic bomb. We made serious cryptography.
Partly true.
http://www.schneier.com/crypto-gram-9805.htmlWe invented the automobile and the cotton gin.
The automobile? As apparently everyone but you knows, you're dead wrong there:
http://www.uh.edu/engines/epi1596.htmIt's amusing to watch people go out of their way to try to find fault with the USA. History won't even bother recording you guys.
The historical record is only of relevance to those who actually bother using it to check their facts before posting.
What would Lemmy do?
uckssay allsbay
This is basic, basic stuff. This is the stuff they teach you *before* they start teaching you the interesting stuff.
It may have a 1990 date on it, but it's 1945-vintage stuff. I suspect it's just the latest reprint of a much older publication.
A couple of hot hookers and a lot of booze.
In GOD we trust, all others we monitor.
hey, I didn't know Taco was Welsh!
m-
You catch enchiladas by picking them up behind the head and holding them underwater until they don't kick anymore -VeGas
This is the manual I used when I trained as a 98C (Signals Intelligence Analyst = SigInt) some 10 years ago. This is *still used* now.
:).
FOUO classification means it shouldn't have been published at all. Just because it's common knowledge does NOT declassify a document. The document can only be declassified by the originating authority (the people who wrote it, and classified it to begin with). You'll see "DECL:OADR" on these docs a lot - "Declassify on Originating Authority Directive".
This FM is meant to teach the basics of cryptology to ASVAB-passing recruits. We run through the whole thing. Some very smart people go into Intel. Some pretty dumb ones do too
Everyone is expected to pass the final after this is taught, which consists of 4 days worth of simulated "traffic" being passed between target stations. We've reference books for traffic pattern types, run locational analysis, crack subsitution ciphers - it's romping good fun.
The encryption methods taught are still used in the field, though less and less thanks to the Internet, crypto-secured frequency-hopping radios, and whatnot, mostly for Meteo and Logistics.
Brings back some nostalgia, reading though this. I hope they don't get into too much trouble for posting it.
-AutoNiN
Starting with the basics is a good idea. One does not immediately jump into algebraic number theory if one is learning mathematics. One learns to add and subtract first. Nothing special. The concepts are still useful even in the days of RSA encryption. Quantum cryptanalysis will not even change that.
because, to be consistant, it would have to be a +1 rating
Sitting Walrus Blog
If it moves, fuck it or kill it.
If it doesn't move, it's not your problem. Let the army deal with it...
Oceans are obviously a problem for the Navy.
But then again, I could be wrong.
If you use a ROT-13 bookmarklet (google for it, maybe at E2), you will find that the parent is correct.
;-)
Does anyone else find it funny that the army includes a table of the probability of english letters, i.e. di-and trigraphs in the document? What are they planning on, war with the British
I'm still trying to figure out what people mean by 'social skills' here.
"When the pin is pulled, Mr. Grenade is not our friend."
I actually have a copy of the US Army's field guide to boobytraps. I wonder how many more of these field guides we would be able to scrounge up online. They are actually quite interesting and informative.
http://www.printfu.org/?mcAction=processFileReques t&pfLocalFile=longTermStorage/Crypto.pdf
Click on the Linked PDF on that page. (It takes a while considering the file is about 9 meg)
Nice troll. It has more to do with the fact that one expect the government that's supposed to protect him to be able to keep secrets from the rest of the world. Any other government has the same prerogative, and the people those governments are intended to protect may have the same objections to their governments' secrets being publicly available.
In Repressive Burma, it's not just your connection that dies. slashdot.org/comments.pl?sid=314547&cid=20819199
http://www.printfu.org/storage/longTermStorage/Cry pto.pdf
I've read Singh's "The Code Book". I liked a lot of the examples given and found it an interesting read.
I'd like to know if there is a good "exercise" book or website with many puzzles of increasing difficulty, including several that may need a computer. I'd much rather do this as an intellectual exercise than crosswords.
Any ideas? The select few web sites I've found tend to have one simple exercise (monoalphabetic cypher) and then suddenly change to really complex ones.
n/c
"If you ask for the BWX every morning in your third transmission, your COMSEC is shot to hell no matter how often to change the cods."
Please explain to me again how a fish can be used to secure communications?
The WWW was invented by a Brit. The very fact that your words here are going down in history is because of 'us guys' ... i.e. non-Americans ... i.e. the majority of the human race dim-wit.
I've read several comments here about removing this from the /. site because it's secret, but in reality it's anything but. I teach cryptography in college, and the ciphers explained in the document and the codebreaking techniques are strictly old school. Nobody even uses these anymore. Old-style ciphers like Playfair, Hill, and even Vigniere have been crackable by computer in a ridiculously small time for the past 20 years.
The areas of interest for codebreakers are in advanced symmetric ciphers and public-key crypto. For instance, cracking modified Feistel ciphers like 3DES, AES, and Blowfish. To date, nobody has made any advances of note in cracking Blowfish, but you never hear anyone talking about what a good algorithm it is. DES has been cracked for a while now thanks to the 56-bit key problem, but the algorithm is solid and AES (a.k.a. Rijndahl) is based off of the same basic concept, but with a bigger key.
The other area of note is in public-key crypto, such as exponential ciphers (RSA) and elliptic-curve crypto, which uses discrete logarithms to make cracking the code akin to solving an almost impossible math problem.
So don't worry that we just gave the enemy the technology to crack our codes -- the stuff in this document was old in World War I.
found this http://www.bbspot.com/News/2005/01/fun_with_encryp tion.html/ .
Let see if this helps break fourth section of kryptos. http://elonka.com/kryptos/
/. or may be I am just seeing things.
BTW, Lately I have been seeing a lot of stories on cryptography on
Should these documents be available to the public?
The original for this came from here on Tue Dec 17 01:21:11 EST 1996.4 0-2/default.htm
http://www.atsc-army.org/cgi-win/$atdl.exe/fm/34-
I am suspicious because the link provided as the original source goes nowhere. Is it possible these documents are not authentic or somehow have been modified?
The tetragraphs table is decidedly dodgy. The reference documents used to make these look like they were full of numbers as text. Not necessarily a good basis for analysis. Surely better to use reference works of English Language at it's best?
Just witness the famous "Joint Army and Navy Basic War Plan--Red" to invade Canada...
This sig has absolutely no significance and serves only to take up screen space and waste the time of the reader.