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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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    Hector Martin‏ @marcan42 21 Mar 2018
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    So... the Ledger hardware wallet's security relies on the attacker not being able to size-optimize its firmware better than the compiler. Yeah. https://saleemrashid.com/2018/03/20/breaking-ledger-security-model/ …

    8:44 AM - 21 Mar 2018
    • 25 Retweets
    • 55 Likes
    • AlbertoLameira Martin Sip Ricardo C. Patrick Ohlson #StaySafe sfan5 Frank Andrew Ｄ  ｅ  ｒ  ｐ  ｏ  ｗ  ａ d3m3vilurr
    5 replies 25 retweets 55 likes
      1. Hector Martin‏ @marcan42 21 Mar 2018
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        I've actually come up with this concept before, when thinking about self-verifying firmware. Of course I dismissed it as a dead end. I've had enough fun cramming things like CTF levels and Wii region-free launchers into 4096 bytes to know better.

        1 reply 0 retweets 22 likes
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      1. Yifan‏Verified account @yifanlu 21 Mar 2018
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        Replying to @marcan42

        Why didn’t they just use something akin tohttps://www.intel.com/content/www/us/en/architecture-and-technology/trusted-execution-technology/trusted-execution-technology-security-paper.html …

        1 reply 0 retweets 1 like
      2. Yifan‏Verified account @yifanlu 21 Mar 2018
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        Replying to @yifanlu @marcan42

        Specifically the measurement stuff. Also https://en.wikipedia.org/wiki/Trusted_Platform_Module …

        1 reply 0 retweets 0 likes
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      1. мэлвин‏ @Yaurthek 21 Mar 2018
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        Replying to @marcan42 @dteam69

        leur OS s'appelle "BOLOS" x') (et ils sont français bien sur)

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      1. Anisse‏ @Aissn 22 Mar 2018
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        Replying to @marcan42

        Anisse Retweeted Saleem Rashid

        Or this one, replacing the MCU with one having a bigger flash:https://twitter.com/spudowiar/status/976813358186975232 …

        Anisse added,

        Saleem Rashid @saleemrash1d
        I don't know whether this is true, but it's definitely possible (there are pin-compatible 64 KiB variants of the MCU). If you use the device without verifying the hardware, it's game over. To prevent Evil Maid attacks, that means checking at EVERY use. https://www.reddit.com/r/ledgerwallet/comments/86b7dk/important_to_everyone_who_bought_a_nano_ledger_s/ …
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      1. Chris‏ @chrisomator 24 Mar 2018
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        Replying to @marcan42

        @philippsteuer evt interessant für den Podcast?

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