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RichFelker's profile
Rich Felker
Rich Felker
Rich Felker
@RichFelker

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Rich Felker

@RichFelker

Yeah, I do @musllibc, FOSS & infosec stuff. But now is not the time for a mostly-/only-tech Twitter feed.

musl-libc.org
Joined March 2014

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    1. Matthew Green‏ @matthew_d_green Feb 28

      Matthew Green Retweeted Thomas Brewster

      I wanted to re-post this news about Cellebrite being able to (probably) decrypt iPhones and discuss an important implication of it.https://twitter.com/iblametom/status/968144061642231808 …

      Matthew Green added,

      Thomas BrewsterVerified account @iblametom
      New - Sources say Cellebrite can unlock every iPhone that's on the market, right up to the iPhone X. Company's own literature says iOS 11 is unlockable. Every law enforcement agency in the U.S. and Europe can access this tech. https://www.forbes.com/sites/thomasbrewster/2018/02/26/government-can-access-any-apple-iphone-cellebrite/ …
      Show this thread
      8 replies 153 retweets 179 likes
      Show this thread
    2. Matthew Green‏ @matthew_d_green Feb 28

      I've seen a handful of proposals to add "law enforcement access" to the encryption used in devices like phones and tablets. These come in various flavors, some of which are better than others 2/

      3 replies 2 retweets 22 likes
      Show this thread
    3. Matthew Green‏ @matthew_d_green Feb 28

      The "best" proposals rely on physical access to the device. They say something like "there is a master key back at Apple HQ, and it can only be used if you get physical access to the device". 3/

      1 reply 1 retweet 16 likes
      Show this thread
    4. Matthew Green‏ @matthew_d_green Feb 28

      Usually "physical access" means something more than just "access to the memory". It relies on some hardware inside of the phone that can detect an attempted access; this is a safeguard against someone stealing the master keys. 4/

      1 reply 2 retweets 9 likes
      Show this thread
    5. Matthew Green‏ @matthew_d_green Feb 28

      What these proposals are saying is "this scheme works if we can build a secure co-processor that will stand up to a sophisticated attacker or intelligence agency". 5/

      2 replies 2 retweets 14 likes
      Show this thread
    6. Matthew Green‏ @matthew_d_green Feb 28

      Which brings us back to the Cellebrite news at the top of this thread. If these reports are correct, then the strong implication is that Cellebrite has bypassed the protections provided by Apple's "Secure Enclave" co-processor. 6/

      2 replies 7 retweets 26 likes
      Show this thread
    7. Matthew Green‏ @matthew_d_green Feb 28

      In short, this means that despite the efforts of the richest and most serious hardware companies in the space, a third-party Israeli contractor has managed to disable exactly this sort of security co-processor. 7/

      3 replies 19 retweets 47 likes
      Show this thread
    8. Matthew Green‏ @matthew_d_green Feb 28

      If Cupertino can't solve this problem when they're strongly incentivized to do so, you're not going to solve it either. This entire design approach has to be viewed as compromised. 8/

      6 replies 20 retweets 67 likes
      Show this thread
      Rich Felker‏ @RichFelker Feb 28
      Replying to @matthew_d_green

      I don't entirely buy the claim that Apple has incentive to make LE access to device impossible. The inventive is to look like they gave their hardest good-faith effort while still succumbing to state-funded-level attackers...

      11:49 AM - 28 Feb 2018
      • 1 Like
      • Garrett Wollman
      1 reply 0 retweets 1 like
        1. Rich Felker‏ @RichFelker Feb 28
          Replying to @RichFelker @matthew_d_green

          ...so they can say "see, you were able to pay hackers to break it, now stop pestering us for a backdoor".

          0 replies 0 retweets 0 likes
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