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“This telegram must be closely paraphrased before being communicated to anyone”
141–144 of 144 posts
Re: “This telegram must be closely paraphrased before being communicated to anyone”
#142I forget who told me this story, but at some point the British tried a crazy known-plaintext attack by planting handwritten notes in dead German soldiers’ pockets that contained an “important message” to be sent, and then in the following days they would attempt to decrypt enigma communications against the known plaintext.
Few years ago I read 'Between Silk and Cyanide': Britain's Wartime Spies and Saboteurs', the autobiography of Leo Marks who worked in the British Special Operations Executive. He designed cryptography for agents behind enemy lines (thus the title: you could print one time pads on silk, and silk was harder to discover during pat-downs than paper). Lots of interesting stories in there, including when he suspected that…
How German, LOL.
Re: “This telegram must be closely paraphrased before being communicated to anyone”
#143Earlier quoted context omitted.
You can listen to the podcast, if you want. It's called operation Mincemeat https://pca.st/podcast/0d412ec0-af39-0139-c19f-0acc26574db2
that's... not what gp was talking about. Why are so many people jumping in with this mistake? Operation mincemeat wasn't a german officer, it wasn't anything about using a known plaintext to compare to coded messages, it wasn't pretending to be german documents, and it wasn't to help with cryptanalysis. About the only similarity is a dead body
You're right. The while planting messages on bodies is what put me on the wrong track.
Re: “This telegram must be closely paraphrased before being communicated to anyone”
#144Earlier quoted context omitted.
Zvtug oR haeRyngRq va guvf RknzcyR, ohg juRa n zRffntR vf jevggRa va n ynml EBG13-yvxR plcuRe, guR yRggRe R oRpbzRf n abgbevbhf eng gung nyybjf nalbaR gb oeRnx guR RagveR guvat va iRel yvggyR gvzR. Enaqbzvmvat/boshfpngvat guR yRggRe pnfR zvtug ohl lbh n yvggyR gvzR, gubhtu V guvax vg'f fbzRguvat RyfR RagveRyl uReR.
ChatGPT was able to decrypt this in about 12 seconds with no context, which I found interesting.
You can do it yourself in about the same time too https://www.dcode.fr/cipher-identifier