How does WhatsApp's end‑to‑end encryption work under the hood?

10 Eki 22:00

I’m trying to understand the mechanics behind WhatsApp’s end‑to‑end encryption. Specifically, how are the encryption keys generated and exchanged for each chat, and what role does the Signal Protocol play in providing forward secrecy? Also, how does the app handle key rotation when a user reinstalls or changes devices? Any high‑level explanation or resources would be appreciated.