In spy movies they ask, if one is on a secure line? What is that? Can Theoretically any communication channel could be eavesdropped?
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In the context of U.S. government/military, I don’t know about the details other than it’s run through a completely different network, just like how classified data runs through the SIPRNet, a network not connected to the rest of the internet.
The thing is that nobody would ask if the line were secure, because they would already know that, because they’d have to use a special phone, on a special network, in a special room.
What’s annoying is if you get a call on a secure phone, then everyone else in the room has to first hang-up any non-secure phone calls before you can answer the secure one, so an unsecure microphone doesn’t potentially overhear any secure conversations.
In the context of U.S. government/military, I don’t know about the details other than it’s run through a completely different network, just like how classified data runs through the SIPRNet, a network not connected to the rest of the internet.
The thing is that nobody would ask if the line were secure, because they would already know that, because they’d have to use a special phone, on a special network, in a special room.
What’s annoying is if you get a call on a secure phone, then everyone else in the room has to first hang-up any non-secure phone calls before you can answer the secure one, so an unsecure microphone doesn’t potentially overhear any secure conversations.
It means the channel is encrypted.
The people on each end of the line have a unique ‘key.’ This key is secret and you can’t share it with anyone. Before the message is sent across the line, it is scrambled into gibberish and the only way to unscramble it is by using the key either you or the other person have.
So hypothetically, if someone intercepted the message, all it would be is a big pile of gibberish and they have no way of knowing what it actually says without the key to ‘unlock’ it.
It means the channel is encrypted.
The people on each end of the line have a unique ‘key.’ This key is secret and you can’t share it with anyone. Before the message is sent across the line, it is scrambled into gibberish and the only way to unscramble it is by using the key either you or the other person have.
So hypothetically, if someone intercepted the message, all it would be is a big pile of gibberish and they have no way of knowing what it actually says without the key to ‘unlock’ it.
It means the channel is encrypted.
The people on each end of the line have a unique ‘key.’ This key is secret and you can’t share it with anyone. Before the message is sent across the line, it is scrambled into gibberish and the only way to unscramble it is by using the key either you or the other person have.
So hypothetically, if someone intercepted the message, all it would be is a big pile of gibberish and they have no way of knowing what it actually says without the key to ‘unlock’ it.
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