"The only device we have seen on Stargate that has not ever shown the weakness of being detected in the Tollan wristband device. The fact that it sends a message within a light pulse makes it very difficult to intercept."
McKay points out that Daniel knows how to send the message if not how it works.
All communication—even if it doesn't use an RF-carrier, even if it uses a subspace-carrier—it still has to operate on a specific frequency so if someone can determine your frequency and crack your encryption, then they can get your message.
The "best" way is communication through a wormhole with a very low-frequency, low-range radio system. Someone can still piggy-back off your signal with that, but they would be in range (like 100 ft or so) that you can see them in hiding.
Also he says the Asgard tech still operates off of some carrier signal that could be intercepted. (And he says that's verifiable because Thor says he had to get "within range" before sending a message which means it sends a frequency modulation through subspace.) If you had a system without a carrier signal, you wouldn't have a range that limits you.
no subject
McKay points out that Daniel knows how to send the message if not how it works.
All communication—even if it doesn't use an RF-carrier, even if it uses a subspace-carrier—it still has to operate on a specific frequency so if someone can determine your frequency and crack your encryption, then they can get your message.
The "best" way is communication through a wormhole with a very low-frequency, low-range radio system. Someone can still piggy-back off your signal with that, but they would be in range (like 100 ft or so) that you can see them in hiding.
Also he says the Asgard tech still operates off of some carrier signal that could be intercepted. (And he says that's verifiable because Thor says he had to get "within range" before sending a message which means it sends a frequency modulation through subspace.) If you had a system without a carrier signal, you wouldn't have a range that limits you.