I think there is a difference between encoding and encrypting, when a HAM changes what he wants to say into Morse code, the message is being encoded, if it is encrypted then the meaning is intentionally obscured with a cypher, then its encryption.
Okay, so if two units have a short conversation on a channel, the one is a Motorola and the other is a Harris, the Motorola might have a better audio quality and when he keys the PTT button it makes a half-second long tone to let him know the channel's clear for transmission, but the Harris only does a little chirp which means the same thing, but the audio might sound different. Do I have this straightened out now?
Okay, that sounds interesting, but it seems like that QKD site was talking about computers and things like that. I thought we were talking about a radio system - which kind of does involve computers, but what I was thinking of was somewhat less advanced than this I think.Spoken good codes only used once or with have changing keys are very secure and are still used by the Department of Defense for that reason. Keep in mind that just one stolen encrypted radio can seriously compromise a system. But also a voice system can probably more quickly recover when new keys are sent out often not needing any technology. In fact, they can be unbreakable (regardless of computer power and time), for example one-time pads, but of course they can be cumbersome and usually only practical only for low traffic volume. If I were currently breaking codes, I would be perhaps happier trying to break a digital one as it would be easier to collect large amounts of data. Each has its positives and negatives and in reality the as voice is moving to be digital, things are changing. Complicating all this is the rise of QKD (quantum key encryption)--which falls into the digital encryption category where the distribution of the key is such that when it is transmitted, if a third party intercepts it, and does not even use it, the authorized users will still know.
Quantum cryptography - Wikipedia
en.wikipedia.org
What is Quantum Cryptography?
Learn about quantum cryptography, including how it works, its pros and cons, the security it provides and its future.www.techtarget.com
Okay. That's what I was wondering about. Thank you. 👍
I think that's what we did a few days ago . . . and then we just started chatting for the fun of it. Wait, did we ever figure out if the number 7 smelled like purple?
Well, KevinC said it did and that's good enough for me.
Okay then. And the color blue tastes like oranges.
Grapes ! Sour ones at that.
