I remember hearing many years ago that one of the branches of the armed aervices during WWII used a native American -- Cherokee? Apache? -- language to communicate. The Japanese (the story goes) went nuts trying to crack the code -- unsuccessfully. Two questions: 1) Can anyone give me a reference for this story (assuming it's true)?
They were the Navajo (or Navaho) code talkers. Kahn's "The Codebreakers" has a discussion of this, as I recall. Probably the "Encyclopedia Britannica" will also a mention of it.
2) If one used a natural language for encryption, and the would-be code crackers did not know it was natural language (say, Hittite), could they crack it? I seem to remember that hieroglyphs were undecipherable until the Rosetta Stone was discovered. But maybe current techniques would do a better job....?
These are codes, not ciphers, and are of course not very secure. The Germans and Japanese in WW II obviously did not have enough time to find native Navajo speakers, and I suspect few books on that language were available at that time, hence the scheme was temporarily secure. Otherwise, forget it. -Tim -- .......................................................................... Timothy C. May | Crypto Anarchy: encryption, digital money, tcmay@netcom.com | anonymous networks, digital pseudonyms, zero 408-688-5409 | knowledge, reputations, information markets, W.A.S.T.E.: Aptos, CA | black markets, collapse of governments. Higher Power: 2^756839 | Public Key: PGP and MailSafe available. Note: I put time and money into writing this posting. I hope you enjoy it.