Private Calling at WhatsApp – Xi Deng
WhatsApp’s mission is to connect the world privately by designing a product that’s simple and private. Privacy and security is in our DNA. In this presentation, we are going to talk about how we build the private calling for billions of users by leveraging client centric architecture and E2EE. We’ll start from discussing the protection levels of user privacy, and our basic E2EE and architecture for 1:1 call and the challenges and benefits for privacy in a client centric E2EE design. Then we will talk about how we evolve our E2EE and architecture for group call and multi-device for scalability.