https://github.com/sigureitimonnji/nvap-protocol [EN] I designed a protocol called NVAP to eliminate the need for vocalizing personal information during call center verification. Check docs/sequence.md in the repo for the core timeline logic.To bypass the strict API/kernel-level RTP restrictions of iOS/Android, I'm thinking of completely bypassing the native call app and handling it via the earphone layer (utilizing RFC 8285 / 9335 Cryptex).However, I am facing two practical challenges regarding the timeline and biometrics:1. The Inbound/Outbound Timeline Mismatch: If the other party answers instantly on an outbound call, or if the user presses the answer button before putting the phone to their ear on an inbound call, the VoLTE connection starts BEFORE the earphone is actually in contact with the ear, ruining the acoustic scanning timeline.2. Biometric Ownership: If the master biometric data is inside the smartphone's Secure Enclave, transferring data back and forth over Bluetooth int...