Emojis in this case are just sort of visual representation of the keys two users exchange before communication. In theory this makes MitM attack impractical.

Emojis in this case are just sort of visual representation of the keys two users exchange before communication. In theory this makes MitM attack impractical. https://core.telegram.org/techfaq#q-how-are-voice-calls-authenticated https://core.telegram.org/techfaq#q-how-are-voice-calls-auth... https://core.telegram.org/api/end-to-end/voice-calls#key-verification https://core.telegram.org/api/end-to-end/voice-calls#key-ver...