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Comment Re:You are wrong. (Score 4, Interesting) 299

Examples of snooping that lack the ability to do a MITM attack:

1. Listening to an encrypted wifi session, then breaking the encryption offline

2. Tapping into undersea fiber (the listening party is going to have a hard enough time exfiltrating the snooped bytes; setting up a "take over" command and associated equipment is prohibitive due to both the technical and political risks)

3. Listening device inside a government facility. China famously does this for example by using a small office-supply firm to get equipment into a US facility somewhere is Asia; the copy machine has a hard drive like any copy machine and there's nothing suspicious about that, right? And then you find the second, and the third, and the fourth hard drive hidden in places you would never look. The data is exfiltrated only when the machine is replaced as part of a regular service contract.
Need I go on?

Comment Re:Encoded string (Score 3, Informative) 287

Ok, never mind about the AOAKN: http://www.ciphermysteries.com/2012/11/02/dead-pigeon-sparks-ww2-cipher-mystery

And decryption efforts are being coordinated here: http://en.reddit.com/r/cryptography/comments/12jipi/ww2_pigeon_carried_an_encrypted_text_here_it_is/.

(Thanks, by the way, for the info about all WWII German spies in the UK.)

Comment Re:Encoded string (Score 2) 287

http://www.bletchleypark.org/news/docview.rhtm/675670 says the red capsule attached to the pigeon is an Allied capsule, so if the code is German the message is from a German spy.

It's more likely the code is British. It has "AOAKN" twice - once at the start and once at the end, and from the digraph frequency (below), "AO" "FN" and "AK" stand out. I think that rules out any Enigma-based codes (e.g. the British TypeX), as well as the US SIGABA - the AOAKN would not be repeated at the beginning and end. I haven't found a description of BAMS yet.

Digraph frequency:
2 AR
2 DJ
2 GH
2 JR
2 ME
2 RZ
2 UA
2 OA, 2 AK, 2 KN (this is AOAKN twice)

3 AO
3 FN

Comment Re:Encoded string (Score 1) 287

If it is either of these ciphers, that means it was a message encoded using a German encryption scheme.

I think that means the message was from a German spy in England or for a British spy in Axis territory. (And the pigeon's number on the band was an "unregistered" number.) Either way, it should be a very interesting message.

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