News for hackers. Stuff that matters.

A comment on Mark Zuckerberg Backs Apple in Its Refusal to Unlock iPhone. Parent comment

Re:Mark Zuckerberg Backs Apple in Its Refusal to Unlock iPhone by JupiterMoon on Tuesday February 23, 2016 @02:17AM (#11157160)
> All Apple has to do is make a piece of software that only runs on this phone and sign it.

(Emphasis added)

Just wondering how they can manage to produce something that will only run on this phone?

[ Parent | on HN ]
Re:Mark Zuckerberg Backs Apple in Its Refusal to Unlock iPhone by tlrobinson on Tuesday February 23, 2016 @02:35AM (#11157226)
Easy. Since iOS software must be signed by Apple they could simply hard code a check for a specific device ID, and immediately exit if it doesn't match. Then they sign that specific binary.
[ Parent | on HN ]
Re:Mark Zuckerberg Backs Apple in Its Refusal to Unlock iPhone by EdHominem on Tuesday February 23, 2016 @12:43PM (#11160683)
That isn't really easy.

99% of the phone can be tampered with when running, after the signature is checked at install. They'd need to put that check in the secure enclave to make sure that it wasn't simply bypassed. That might not even be possible on that model.

[ Parent | on HN ]