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Enigma
Posted: Wed Sep 07, 2011 2:21 pm
by bsguedes
Nice challenge!
It's great to finally find classic crypto challenges like this one using Enigma machine and the other one using RSA ciphering (even if the challenge doesn't work
). Challenges after Spiral Bits are much more interesting!
Is there a part 2 for this challenge?
I ask myself how difficult it would be if it have more rotors (ergo, a longer key), or if the plugs were unknown.
Posted: Thu Jan 19, 2012 10:53 am
by Rat62
Fortunately the "Ringstellung" (which determins the turnover position) was left unchanged. So it was possible to brute force those abt 1000000 possibilities with probable words.
Nice challenge!
Posted: Tue Jan 24, 2012 3:14 pm
by dangermouse
Phantastic challenge, i had an own prototype in Freepascal to do brute force with index of coincidence to check the output for validity. The prototype also can break Naval Enigmas (with known plugboard), though I am not sure how long it would take to get it done.
The answer I get is a bit mangled in the beginning:
JUJLHYPUKAQGJRMYMALLENGEISABITLONGERTHANNORMALTOTAKETHEFULLADVANTAGEOFTHETHIRDGEARBYTHEWAYTHEANSWERIS*********** ioc:1.45559845559845
Was that intention or my Enigma machine needs some tuning?
Posted: Tue Jan 24, 2012 7:32 pm
by Rat62
Same here. Perhaps to make it less easy. Regarding the Ringstellung: It doesn't really matter. We didn't know the Walzenstellung (the initial three letter code) anyway.
Posted: Sun Aug 03, 2014 4:04 pm
by Seter
I used "OUT" as the initial state and got an all-meaningful output. But I've noticed that the second rotor rotated both meeting the 16th and 17th letter(O and Z). Is this behavior a bug or well defined?
Posted: Mon Sep 15, 2014 9:13 am
by Hippo
Seter wrote:I used "OUT" as the initial state and got an all-meaningful output. But I've noticed that the second rotor rotated both meeting the 16th and 17th letter(O and Z). Is this behavior a bug or well defined?
It's well defined
