Wirt writes: > Gavin writes: > > As far as I know, Navajo was never used for written cryptography as it > > wouldn't be that hard to break (you would quickly learn which was the > > picturesque Native American word for "aircraft carrier" and so on). > > [...]However, the Navajo never had a written language, idiographic or > otherwise. True, but it is possible to come up with a purely phonetic spelling for any true spoken language, so while the Navajo never had a written language of their own, the words could have been written phonetically as in a Navajo/English dictionary (I have one somewhere). So if there really was a cryptographic value to the language itself, it certainly *could* have been written down for that purpose. G.