Apple is outright lying here. "the technique could be used on any number of devices" - not since the iPhone 3GS! https://www.apple.com/customer-letter/answers/ …
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Replying to @marcan42
Apple introduced per-device firmware signing (SHSH blobs) in the iPhone 3GS to stop people from downgrading (as a jailbreaking deterrent).
5 replies 6 retweets 5 likes -
Replying to @chrisFnicholson
@chrisFnicholson You can't downgrade an iPhone to an older, jailbreak-vulnerable version (unless you have the matching SHSH blob).2 replies 0 retweets 1 like
Replying to @chrisFnicholson
@chrisFnicholson Nothing. Same with their firmware signing key. If they did that they wouldn't need Apple's help either.
11:10 AM - 22 Feb 2016
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