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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 12 Mar 2020
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      So, the problem with USB tokens that we basically have two choices: - Unauditable black boxes built on *supposedly* more secure ICs that require NDAs to develop for - Open and auditable, but definitely pwnable off the shelf microcontrollers. Which poison do you prefer?

      19 replies 16 retweets 50 likes
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    2. Hector Martin‏ @marcan42 12 Mar 2020
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      So far I've favored the first one, because you *know* all those keys based on a random STM32 are going to be glitchable, and closed stuff *might* be better. But after ROCA and other fails, maybe open firmware is better and just hope nobody physically attacks your key?

      3 replies 0 retweets 10 likes
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    3. Hector Martin‏ @marcan42 12 Mar 2020
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      Keep in mind that this depends on your use case, e.g. a key keeping SSH keys needs to be more secure than a key used for FIDO U2F login for a handful of websites, because the latter is a second factor only and easier to revoke/replace.

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    4. Hector Martin‏ @marcan42 12 Mar 2020
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      Also keep in mind that open does not mean secure, I've seen some absolutely abysmal firmware in "open" firmware projects along these lines too. I guess what I'm asking is whether it's worth doing #2 "right" with the caveat of being vulnerable to physical attacks.

      3 replies 0 retweets 8 likes
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    5. http‏ @SwissHttp 12 Mar 2020
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      Replying to @marcan42

      Are you sure #1 is not vulnerable to physical attacks?

      1 reply 0 retweets 0 likes
    6. Hector Martin‏ @marcan42 12 Mar 2020
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      Replying to @SwissHttp

      No, it just ostensibly tries harder than #2. I honestly have no idea why absolutely no secure element vendor has tried opening up their docs. It's ridiculous.

      1 reply 0 retweets 0 likes
    7. http‏ @SwissHttp 12 Mar 2020
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      Replying to @marcan42

      That might be a business case. Or, maybe if you see the NDA‘d docs, you immediately know it’s vulnerable by design.

      1 reply 0 retweets 0 likes
      Hector Martin‏ @marcan42 12 Mar 2020
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      Replying to @SwissHttp

      Indeed. 🤔

      6:35 AM - 12 Mar 2020
      0 replies 0 retweets 0 likes

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