zlacker

>>xairy+(OP)
I thought the whole point of these camera LEDs was to have them wired to/through the power to the camera, so they are always on when the camera is getting power, no matter what.

Having the LED control exposed through the firmware completely defeats this.

>>sbarre+T1
They are hardwired on Macbooks. From Daring Fireball, quoting an email from an Apple engineer.

> All cameras after [2008] were different: The hardware team tied the LED to a hardware signal from the sensor: If the (I believe) vertical sync was active, the LED would light up. There is NO firmware control to disable/enable the LED. The actual firmware is indeed flashable, but the part is not a generic part and there are mechanisms in place to verify the image being flashed. […]

> So, no, I don’t believe that malware could be installed to enable the camera without lighting the LED. My concern would be a situation where a frame is captured so the LED is lit only for a very brief period of time.

https://daringfireball.net/2019/02/on_covering_webcams

>>542458+96
While Apple made a laudable effort in this design, sadly it requires thoughtful care and design at every iteration. Typically the iPhone team couldn't pull it off and the only official claim is for macbooks.

I think it's simpler to assume that most devices can be hacked and the LED indicator isn't infailable than to always keep in mind which device lines are supposed to be safe and which ones aren't.

>>makeit+CL
Apparently it was purely in software on iPhone/iPad. However, starting with the iPhone 16 and M4 iPad Pro, the LED indicator is rendered by a separate secure exclave:

https://www.tomsguide.com/phones/iphones/iphone-16s-a18-chip...

https://mastodon.social/@_inside/112552696723119626

>>microt+7Z
That is purely in software.