Re:"Unbreakable" Encryption Almost Certainly Isn't
by Loughla on Tuesday April 08, 2014 @11:29AM
(#7553977)
Congratulations, you just reinvinted numbers stations.
Send random data that is probably meaningless, until which point you send real data. Let everyone listen in to the gibberish for 50 years, in the end, only the person with the key knows the message.
The known solution to this is to pad messages to some fixed length. The obvious drawback is that you have to choose the fixed length message to be as long as the longest message you may wish to transmit, which could result in having to transmit rather a lot of padding.
The equivalent of this for real-time communications is to transmit continually at a fixed bit rate regardless of whether you have any data to send at any given time.