“[T]hey devised a code that was undecipherable both then and now”

Any code that uses a key that is non-repeating is unbreakable. Codes are broken by studying patterns. If there are no patterns, then you have nothing to study.

For example, say you want to send a message to somebody that you know will get intercepted. To make it unreadable, you simply employ a system where you replace each letter with a substitute letter according to a pre-determined cipher that only you and the reader knows. And that key to that cipher changes every day because it is based upon a common denominator that constantly changes – such as the headline of a local newspaper which is available to both sender and receiver without communication. That way the letter A, for example, is not represented by the same cipher letter from day to day. It changes according to the key for that day. And the key for that day changes in a way nobody can predict, since nobody can predict what the headliner writer is going to write – not even the headline writer.

keep the change on November 24, 2012 at 6:54 PM