If you can exchange a one time pad out of band via a secure channel (say, face-to-face) then you have absolutely unbreakable encryption, no matter how good the

If you can exchange a one time pad out of band via a secure channel (say, face-to-face) then you have absolutely unbreakable encryption, no matter how good the attackers are. This doesn't stop side-channel attacks, but it invalidates and questions about the strength of the encryption algorithm. One can only hope that Greenwald et al have been clued into this.