Read this code to your peer over a separate trusted channel (phone call, in person).
Both codes MUST match exactly. Any mismatch = active MITM attack → abort immediately.
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Derived from ECDH shared secret via HKDF-SHA512 · 96-bit verification
⚠ FINGERPRINT UNVERIFIED—
⚠ SESSION WILL AUTO-DESTRUCT IN 60s DUE TO INACTIVITY