Wired has an interesting and in-depth article on this. Also, the camera seems to have more security than earlier.
> In the MacBook, the Secure Enclave is part of Apple’s new T1 processor, meaning it’s tied explicitly to the touch bar and Touch ID. It’s also, though, in charge of your webcam, a small but important difference.
> “In previous generations of Macbook the webcam light was software controlled—which meant that an attacker who compromised your OS could potentially activate the camera without turning on the light,” says Johns Hopkins University cryptography expert Matthew Green. “Adding a separate secure processor could make this much harder to do.”
> In the MacBook, the Secure Enclave is part of Apple’s new T1 processor, meaning it’s tied explicitly to the touch bar and Touch ID. It’s also, though, in charge of your webcam, a small but important difference.
> “In previous generations of Macbook the webcam light was software controlled—which meant that an attacker who compromised your OS could potentially activate the camera without turning on the light,” says Johns Hopkins University cryptography expert Matthew Green. “Adding a separate secure processor could make this much harder to do.”
https://www.wired.com/2016/10/macbook-pro-touch-id-secure-en...