Question of the Day
One question per day to look beyond the headlines.
Where does WhatsApp’s “Incognito” privacy boundary actually sit: storage policy, encryption, or execution environment?
Take-away “Incognito” privacy is enforced by running AI inference inside a TEE, so even the operator can’t read plaintext; deletion is secondary cleanup after enclave use.
WhatsApp's "Incognito" privacy boundary primarily sits at the execution environment. The messages are processed in a Trusted Execution Environment (TEE), which ensures that Meta cannot access the message content during processing. Additionally, conversations are not saved; they disappear after the session ends, and the data is deleted after processing, including private web searches, thus indicating a strong ephemeral storage policy as well [1], [2], [3].
- Meta Says Its AI's New Incognito Mode Is So Private Even Meta Can't See Your Chats - CNET cnet.com (opens in new tab)
- [2604.26974] C8s: A Confidential Kubernetes Architecture arxiv.org (opens in new tab)
- WhatsApp now lets you have incognito conversations with Meta AI - 9to5Mac 9to5mac.com (opens in new tab)