In setting up the xx Messenger Android app, I’m being offered to enable Cover Traffic.
It not only hides *when* you send messages...
Fair enough, it obfuscates when I’m sending a real message vs a “cover” message
...but helps hide who you are talking to
This is the bit that has me feel uneasy. Isn’t the cMix metadata obfuscation is strong enough to hide who I’m talking to?
It’s not like there is only one conversation going on, so therefore the participants must both be Alice and Bob.
To me, adding this last phrase makes the network sound weak without cover traffic. Do we really need more “help” in hiding who we are talking to than is provided by the underlying network?
Can the advantage of this “help” be quantified?