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marcan42's profile
Hector Martin
Hector Martin
Hector Martin
@marcan42

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Hector Martin

@marcan42

If it ain't broke, I'll fix it! I'm porting Linux to Apple Silicon Macs at @AsahiLinux. http://patreon.com/marcan  | http://github.com/sponsors/marcan 

Tokyo, Japan
marcan.st
Joined May 2009

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    1. Hector Martin‏ @marcan42 31 Mar 2016
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      Seriously, this myth won't die. Repeat after me: the Secure Enclave in newer iPhones does *not* help against the FBI attack scenario.

      7 replies 10 retweets 20 likes
    2. SwiftOnSecurity‏ @SwiftOnSecurity 31 Mar 2016
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      Replying to @marcan42

      @marcan42 which FBI attack scenario

      1 reply 0 retweets 0 likes
    3. Hector Martin‏ @marcan42 31 Mar 2016
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      Replying to @SwiftOnSecurity

      @SwiftOnSecurity All of them except jailbreak. The "get Apple to help" scenario, the "NAND replay" scenario, the "FIB the CPU" scenario, etc

      2 replies 0 retweets 2 likes
    4. Yifan‏Verified account @yifanlu 31 Mar 2016
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      Replying to @marcan42

      @marcan42 agree on first and last one. Isn't RPMB supposed to prevent second? TrustZone usually works with RPMB.

      2 replies 0 retweets 0 likes
    5. Hector Martin‏ @marcan42 31 Mar 2016
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      Replying to @yifanlu

      @yifanlu No RPMB on any iPhone (it doesn't use eMMC). But also most eMMC has backdoors that make RPMB worthless anyway.

      1 reply 0 retweets 3 likes
    6. mitp0sh ( みとぽしゅ )‏ @mitp0sh 5 May 2017
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      Replying to @marcan42 @yifanlu

      Hey, referring to RPMB... Would you mind explaining why you think the mechanism is mostly useless because of vendor specific "backdoors"?

      1 reply 0 retweets 0 likes
      Hector Martin‏ @marcan42 5 May 2017
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      Replying to @mitp0sh @yifanlu

      eMMC devices all run firmware, and that firmware almost always has secret vendor specific commands that allow you to take over.

      6:42 AM - 5 May 2017
      2 replies 0 retweets 0 likes
        1. New conversation
        1. Jon Sawyer‏ @jcase 5 May 2017
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          Replying to @marcan42 @mitp0sh @yifanlu

          http://theroot.ninja/disclosures/SAMDUNK_1.0-03262016.pdf …

          1 reply 0 retweets 0 likes
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        1. mitp0sh ( みとぽしゅ )‏ @mitp0sh 5 May 2017
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          Replying to @marcan42 @yifanlu

          Okay, I'm aware of that but more interesting is the question whether it is realistic to reverse engineer these commands.

          1 reply 0 retweets 0 likes
        2. mitp0sh ( みとぽしゅ )‏ @mitp0sh 5 May 2017
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          Replying to @mitp0sh @marcan42 @yifanlu

          Sure BruteForce might be an option here, but that might not be trivial or am I wrong?

          1 reply 0 retweets 0 likes
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