Alexandr Wang (Chief AI Officer at Meta) explains how each Muse runs inside its own "secure VM", a sandboxed, isolated mini computer, and the data you share with it is stored only there.

Whenever the agent tries to send anything out, like filling a form or making a call, a separate "sentinel" agent checks it and blocks sensitive data such as credit card or Social Security numbers.

Muse also asks the user to approve every new website it wants to contact or send data to.

A more encrypted "confidential VM", is coming later with the goal of WhatsApp-level guarantees, though it may be slower.

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Full video on "Cleo Abram" YouTube channel, (link in comment)