fra366
Junior Member
Posts: 54
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Post by fra366 on Apr 28, 2016 4:39:12 GMT
This is an open Thread for Anything Enigma related. Building, History, Encrypting, Decrypting, new ideas, etc.
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fra366
Junior Member
Posts: 54
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Post by fra366 on Apr 28, 2016 22:44:16 GMT
I will be reposting the Enigma Crypto post here however I will have to rebuild it. It took me almost two hours to put the original post together and since I did not save it, I will have to rebuild it. I will work on it this evening so I should have it done tonight ......it might be rather late before I get it done and posted again.
Please feel free to post anything here that is Enigma related. This is open to anyone that would like to pull up a chair and participate. Bring your favorite brew, coffee, tea, etc and enjoy. Most of us are busy with life so if all you can do at the moment is stop by and say Hello that would be great. Should your time allow an Enigma message that would be just as good. I would really like this to be a place where we can relax with Enigma.
Thanks to All,
FRA366 (Mark)
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fra366
Junior Member
Posts: 54
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Post by fra366 on Apr 28, 2016 23:42:44 GMT
LFEMVP RUFP JQWA MA TVPA WER AWSFEA RUFP JQWA MA IWE
UJFE TFBFRMAQ
Above is the crypto message just the way it would be without encrypting with the Enigma. To save myself time this evening I did not encrypt this with the enigma like I did when I posted this before. The original crypto had X's where there are now V's (only two). I had to change them because we use X's in the enigma coding to separate parts of the message. Hope you have fun with it. Maybe the answer you get could be put back into the Enigma. This was the first crypto I had ever done. Gave me a rough Idea of what the people at Bletchley Park had to go through although I know it was much harder for them.
Have Fun!!
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Post by Arduino Enigma on Apr 29, 2016 3:47:40 GMT
On a key not encrypting to itself being a bad idea. The Enigma machine sends current from the pressed key through a series of rotors. The last rotor is connected to a reflector, a device with pins only on one side. A signal coming into a pin would come out of another pin and return back thru the rotors, ultimately coming out of the entry rotor to light a bulb in the lamp field. Since the reflector would return the signal from a key back through another path, a key would never encode to itself. This also made decrypting easy. Setting the machine and typing clear text would encode it. Resetting the machine to the initial settings and typing the encrypted text would produce the original clear text. Initially these features were thought to be advantages rather than weaknesses of the system. Take the following encrypted text, using the Happy New Year settings: enigmaworldcodegroup.freeforums.net/thread/14/happy-new-yearCan you guess what the message is without decrypting it? Is there any letter that does not occur in the text? GMEEH DNYIW AAUUB FWCQO BGMCD GGICP NVIND GJHGP BZGWZ YVNVU IDDPS UWSVZ PKRMD DLCWY VMNZZ PIHNU QPQQD XRAFQ DEFAI VXWUR BUKQX GUXUB QPCOB DPSZL JKDDJ DZSCC CMRQL NHXAU FAEAN MSKGQ CQLSE IZCQS NFDDR BNVQA NQVRE SPNNL XVBFC NVDOI KKCIL DXCUM XXUHW ZBQYE KEJAM GFFSD OHCIW BRHXO OXYLH NBPCR To decrypt the text above, set the starting wheel position to AAA. There is no Kenngruppe, decryption starts from the first character group. This flaw enabled cryptanalysis of the Enigma machine using the Turing Bombe. A setting could be discarded if a contradiction was detected: a key encrypting to itself. Other machines would solve this by either eliminating the reflector or providing a selection switch that would modify its behavior to make it non-recyprocal. Examples of those are the KL-7 and the Fialka. www.cryptomuseum.com/crypto/usa/kl7/index.htmwww.cryptomuseum.com/crypto/fialka/index.htmOfficer to Officer messages sent using the Enigma machine were double encrypted. The sending officer would encrypt the text first and give it to the enigma operator. The message was encrypted again using the daily settings so it could be sent over the air. The receiving side would decrypt with daily settings first then hand the inner encrypted message to the receiving officer for final decryption. Double encrypted messages can result in a clear text letter encrypting to itself on the second round. We continue to use the Happy New Year settings. Lets set the rotors to BBB and encrypt a string of Q. This is the resulting string, notice the absence of Q in it. NWMXO CXTYW YFHZU LOHTU SHZGH ZNIEY BMWML VVVYF UOITR BBMCZ FHHTK STVYV We will now change the wheels to CCC and send the NWMXO... string through the enigma machine again: SJABQ MSKCT WQVNM PRVPG XTNDE GDMNK LEZAK FIHUE KXDMC UGIQW RKRXY JIFFX Notice there is a Q on the 1st, 3rd and the 10th groups The drawback is that the decryption must now be done in the inverse order. First set the wheels to CCC and decrypt SJABQ..., it will produce NWMXO... set the wheels to BBB and decrypt NWMXO... the Q's will come out.
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Post by lpaseen on Apr 29, 2016 13:31:50 GMT
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Post by lpaseen on Apr 30, 2016 2:31:56 GMT
I now have my solution to the cryptogram above I noted that the two 3 letter words where WER and IWE then I worked (using the links above) on finding two words that could fit in and has the first two letters and last two letters the same, and after lots of guessing I think I at least solved the first part, just don't get the signature, google tells me something else in that regard.
[EWGC2016] WMR RUH DGWRG XOBOS CUPYQ UCKRQ JJMGZ KEUVY WSZGX QRUSK UCLZA UVQWB EZNYU TRJFF
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fra366
Junior Member
Posts: 54
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Post by fra366 on Apr 30, 2016 5:16:57 GMT
Way to go.....you are spot on. I hate to admit this but the first name.....UTFE.......should be UJFE.......with a J and not a T. I had erased on the paper I was working on many many times and erased the curl part of the J off and into a T. Again my apologies. Great work and Thanks for the post. I must say that I did not solve it as fast as you. I worked on it during my lunch and in the evening for a couple of days but finally got it. Working on one now that I just can't get to make sense but I know I'm close. Hope it was fun!!!!
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fra366
Junior Member
Posts: 54
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Post by fra366 on Apr 30, 2016 5:27:24 GMT
Please note that the first name in the crypto......should be UJFE.....and NOT UTFE......my mistake. Sorry guys. I know the rest of it is right because Ipaseen got it 100% right. I will respond to the other posts tomorrow after I get home in the evening. Long hours today at work and have to put in a few tomorrow. So heading off for some sleep.
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Post by lpaseen on Apr 30, 2016 14:44:28 GMT
Ok, after changing T to J google told me why it didn't add up, it's not his real name - it's the name he used when he published a volume of poems. Once I solved the first one I looked around and found that it is in a book titled "Cryptogram a day" by Louis b Moll. I then took a stab at the April 29 one from that book AH N DNG FJRQI LNYO LNQH LAW TAWLOW, LO TJRQI IJRPQO LAW VXJRPQOW. POGBNDAG And with help of www.cryptogram.org/solve_cipher.html and a dictionary where I can search for words like x??y? I managed to solve that one much faster (since I now figured out a procedure).
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Post by lpaseen on Apr 30, 2016 15:39:40 GMT
And to keep with the enigma subject, this does (as you said earlier) give an insight to what the people at bp did. Of course they had it way more tricky since the rotors changed the encryption for each letter, had only have pen and paper, and at stake was a lot more than some fun and self satisfaction of being able to solve it.
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Post by Arduino Enigma on May 19, 2016 10:44:39 GMT
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Post by ZZ9pZa on May 19, 2016 18:32:27 GMT
Wow Arduino Enigma, Very cool! did you made it yourself? Impressive. I own an Enigma-E myself. I have a few questions; - What is the material (black) that you've used?
- Where did you get the enigma logo? (I've been looking for that for a very long time. They didn't sell it at Bletchley Park even)
- What did you use for the steckers?
Very good job!
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Post by ZZ9pZa on May 19, 2016 18:34:44 GMT
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Post by lpaseen on May 19, 2016 18:56:11 GMT
Guess I need to put in a faster gear to get meinEnigma.com completed, only have the prototype and some blank boards for the moment.
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Post by Arduino Enigma on May 19, 2016 22:42:22 GMT
ZZ9pZa: Love your Enigma-E. I have been looking at that kit for a long time, long before deciding to make my simulator. Grant's machine is impressive indeed, but that is not my creation. That is the Open Enigma by the folks at S&T Geotronics: www.stgeotronics.com/Enigma-Replica_c3.htmMine is much smaller, 3"(D) x 2 3/8"(W) x 1" (H) when opened The only question I can answer is about the logo. In the picture, it looks like the logo is raised. At the time, the only laser cutting company that offered black acrylic with an aluminum top was www.pololu.com/docs/0J24/3#acrylicThey offer to cut 1/8" (3mm) and 1/16" (1.5mm) widths. Ponoko now offers 1.5mm aluminum on black: www.ponoko.com/make-and-sell/show-material/610-acrylic-two-color-brushed-silver-on-blackThe next step is to get the logo from Wikipedia en.wikipedia.org/wiki/File:Enigma-logo.svg and carefully manipulate it in Inkscape to remove the gradient background and the ornate rivets on the side and color the appropriate cut / raster lines You can tell which logo somebody is using by the triangular shapes inside the M and the top shape of the A The finished product can be sent to the laser cutting houses. Pololu is ok with only the logo design, they panelize the design and depanelize the output, sending you only the useful part. Ponoko requires you to put the design inside their template files and send you the whole sheet. I order a few at a time from Pololu and send one with each machine order. It is also available by itself at www.ponoko.com/design-your-own/products/enigma-machine-logo-keychain-12199
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