Alice wants to share a message with Bob, but Alice and Bob can never be in the same place at the same time. We can assume they both know each others public keys (or agreed on a shared key, if that makes a difference).
Is it safe for Alice to broadcast the ciphertext over the TV/radio/public internet/etc, or should she send Bob the ciphertext over video chat/phone/email?
I understand that modern algorithms are resistant to ciphertext-only attacks, but is the layer of obscuring the email from the public practically beneficial?
a bad thing
. It is however, bad to rely on it. It actually has several potentially good uses. – user2338816 Mar 14 '15 at 6:45