Yeah that seems right. I guess an attacker could tamper with the call early on, say "hey what are your emojis?" as soon as the call starts. Deepfaked voices a

Yeah that seems right. I guess an attacker could tamper with the call early on, say "hey what are your emojis?" as soon as the call starts. Deepfaked voices and 2 henchmen should be sufficient here, no need for real-time audio rewriting. Then once the emojis have been verified, switch to a pure-eavesdrop MITM. To defend, could ask to verify emojis at a random point in the middle of the call to make the attacker's life more difficult. Especially right before discussing sensitive information ;-) Or drip verify over the course of the call, e.g. "what's your 3rd emoji?", and listen for signs of an attacker cutting in and out.