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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. Charles Guillemet‏ @P3b7_ 12 Mar 2020
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      Replying to @marcan42 @pavolrusnak

      On one side, chips have been audited by highly skilled 3rd party lab and are designed for security On the other side, chips are pwned by design... Auditability is great if it improves the security, if no skilled people audit them and they are already pwned, what's the point?

      1 reply 0 retweets 0 likes
    3. Hector Martin‏ @marcan42 12 Mar 2020
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      Replying to @P3b7_ @pavolrusnak

      On one side, firmware has not been audited by anyone competent (evidence: ROCA; it's clear that FIPS certification and such is useless) On the other, you can audit it yourself, and people will for a popular product.

      1 reply 1 retweet 4 likes
    4. Charles Guillemet‏ @P3b7_ 12 Mar 2020
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      Replying to @marcan42 @pavolrusnak

      FIPS is not very relevant... Common Criteria certification is. (and ROCA chip was CC certified). CC are not perfect (hence ROCA), but it doesn't mean they are useless... It remains far away more difficult to break a CC chip, than a STM32

      3 replies 0 retweets 3 likes
    5. Charles Guillemet‏ @P3b7_ 12 Mar 2020
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      Replying to @P3b7_ @marcan42 @pavolrusnak

      Auditability is great, but only if it brings more security! Auditability on a broken device only allows everyone to verify it's indeed broken... NDA for secure chips is not ideal, but vendors want to protect their IPs... Designing a secure chip is not easy!

      2 replies 0 retweets 0 likes
    6. Hector Martin‏ @marcan42 12 Mar 2020
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      Replying to @P3b7_ @pavolrusnak

      Re NDAs, nonsense. That's all just either security by obscurity (fear of actual flaws being discovered by wider auditing) or corporate image BS. Making your programming spec public does not give away your silicon secrets, otherwise *no* IC vendor would do it.

      1 reply 0 retweets 6 likes
    7. Charles Guillemet‏ @P3b7_ 12 Mar 2020
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      Replying to @marcan42 @pavolrusnak

      It allows to understand how countermeasures are working...

      1 reply 0 retweets 0 likes
    8. Hector Martin‏ @marcan42 12 Mar 2020
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      Replying to @P3b7_ @pavolrusnak

      No it doesn't. The programming spec is irrelevant for stuff like silicon voltage monitors and metal layer meshes, which are the kinds of things which actually provide environmental security.

      2 replies 0 retweets 6 likes
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      Hector Martin‏ @marcan42 12 Mar 2020
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      Replying to @Serianox_ @P3b7_ @pavolrusnak

      No, making the documentation non-public means people aren't going to find your mistakes and flaws earlier, thus ensuring that when you *do* get pwned, there is a huge install base of vulnerable products. Security by obscurity does. Not. Work. Don't try to claim it does.

      4:41 PM - 12 Mar 2020
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      • Emelia/Emi pls vaccinate me (*🌎) Matando
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