Caesar's Battlefield Messages

"altamix" <altamix@...> wrote:
"So similar was this that Augustus was obliged to crypt his correspondence
with his generals from Greece for not being read by celts."

I believe that was Julius, wasn't it? He used Greek 'literati' so that if
the messages were intercepted, the Celts could not read them. Meaning, at
minimum that some Celts adversaries could read Latin in the 1st Centuty BC.
But didn't Caesar also write that the Druids used Greek to write all their
business communications, etc., and only used Celtic for religious stuff?
That always bothered me. He wasn't worried about Druids reading his messages?

S. Long