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Apple's T2 chip will prevent hackers from eavesdropping on your microphone

techcrunch.com

101–110 of 159 posts

Re: Apple's T2 chip will prevent hackers from eavesdropping on your microphone

#101

Congratulations Apple for implementing the spst switch in 7nm with 23 million transistors.

The T2 is used for: - image signal processing - an audio controller - a mass storage controller - a dedicated AES engine for encryption. - secure enclave for touch id

Jeez, sounds like the T2 is prime to be merged into systemd.

Someday we'll find that the image processing function has a bug that lets you control the microphone when you open some stupid meme. Great separation of security

Re: Apple's T2 chip will prevent hackers from eavesdropping on your microphone

#102

I'm really wondering if there even was 1 customer request for this.

My company (major telecom) literally gives away camera covers. Surely they'd do same for mics if there was a convenient cheap way. There's plenty of rumors about mics & cameras being commandeered by hackers & secret agencies. Apple gets ahead by actually securing mic access. Lots of people want it.

Rip the mic out

Plug in USB mic when you need one.

Re: Apple's T2 chip will prevent hackers from eavesdropping on your microphone

#103

Congratulations Apple for implementing the spst switch in 7nm with 23 million transistors.

The T2 is used for: - image signal processing - an audio controller - a mass storage controller - a dedicated AES engine for encryption. - secure enclave for touch id

That is truly impressive

Re: Apple's T2 chip will prevent hackers from eavesdropping on your microphone

#106
post #2

Why is it so hard to believe the headline?

Because you know that the technology to physically disconnect a microphone when a lid is closed is extremely simple, and doesn't require a computer chip that is impossible for the user to audit.

If you don’t trust Apple and you’re using Apple hardware you have bigger problems than the mic.

Re: Apple's T2 chip will prevent hackers from eavesdropping on your microphone

#107

Earlier quoted context omitted.

The trivial solution would be a LED + resistor just wired across the mic's power rails.

When the microphone is a passive connected to a multifunction IC there's no such power rail.

Most laptop mics are condenser electret mics which usually use a small dc current, although not always.

Re: Apple's T2 chip will prevent hackers from eavesdropping on your microphone

#108

Earlier quoted context omitted.

> The light is connected to the actual power of the camera and cannot be disabled unless the camera is also disabled. This was proven false when malware was discovered that accessed the camera on Mac laptops without activating the LED light. It's mentioned in the article.

Am I the only one who has tape over my laptop camera? (Specifically a peppa pig sticker)

I have an EFF sticker specifically for this.

Re: Apple's T2 chip will prevent hackers from eavesdropping on your microphone

#109

Earlier quoted context omitted.

Physical switch could be done with a very small magnet behind the lid surface and an opposed micro-reed switch (or other magnetically actuated on/off device) buried behind the body surface. No surface penetrations, no exposed moving parts (reed relays are hermetically sealed).

And a magnetic switch is far too easily defeated

My parent’s table pads do precisely that. After a particularly baffling family tech support call I drove over. Their kitchen table pads magnetically lock to stay nicely aligned, and also either put a laptop to sleep, or keep it awake when closed depending how you place them.

Re: Apple's T2 chip will prevent hackers from eavesdropping on your microphone

#110

Earlier quoted context omitted.

The camera already functions this way. The light is connected to the actual power of the camera and cannot be disabled unless the camera is also disabled. The microphone, to my knowledge, doesn't function like this but I don't think it makes sense for it to function like this as the microphone doesn't really need power outside of what's provided to the amps and DACs inside the machine. It would be too easy to work ar…

> The light is connected to the actual power of the camera and cannot be disabled unless the camera is also disabled. This was proven false when malware was discovered that accessed the camera on Mac laptops without activating the LED light. It's mentioned in the article.

The article TechCrunch links to, about Patrick Wardle’s research on the FruitFly malware, actually never mentions defeating the webcam LED: https://www.zdnet.com/article/new-analysis-fruitfly-mac-malw...

It’s possible that Wardle’s Black Hat paper does, but the link doesn’t back up the assertion in the TechCrunch piece.

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