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  1. Retweeted

    i believe i just did something no one has ever done before: i wrote a constant-time galois field implementation on a 6502 chipset, which not only does not have a constant-time hardware multiply instruction, but does not have a multiply instruction at all

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  2. Retweeted

    Say hello to OpenSK: a fully open-source security key implementation -

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  3. Retweeted
    30 Dec 2019

    When Inner Mongolia has better train service than your tech capital.

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  4. 20 Dec 2019
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  5. 20 Dec 2019

    "Linux 5.3 will turn back getrandom() into /dev/urandom with its never-blocking behavior" Wait, what? Was getrandom crippled without me noticing? I can find an LWN thread but nothing definitive.

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  6. Retweeted

    Partly inspired by 's tweets, I dug a little more into recent findings on the relationship between air pollution and cognition. The effects seem rather amazingly large: .

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  7. Retweeted

    Preliminary list of talks for IACR Real World Cryptography is now out:

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  8. Retweeted
    1 Nov 2019
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  9. Retweeted
    30 Oct 2019
    Replying to

    You write: "the computational demands of SIKE out-weigh the reduced network traffic. Only for the slowest 5% of connections are the smaller messages of SIKE a net advantage." Applies also to net energy measurements with portable devices (my slides for ETSI workshop next week).

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  10. 30 Oct 2019

    “Real-world measurements of structured-lattices and supersingular isogenies in TLS” (Although you might prefer the more detailed Cloudflare version, which has cute animals: )

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  11. Retweeted
    10 Oct 2019

    you think you test in prod, but do you test in prod like Boeing used to?

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  12. Retweeted
    7 Oct 2019

    The answer is always "use getrandom()". getrandom() blocks? Your system doesn't have enough entropy to seed the rng. Fix that, don't come up with other ways to make yourself believe you're generating random numbers.

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  13. Retweeted
    3 Oct 2019

    The CJEU's ruling in Glawischnig-Piesczek is out, and it is basically the worst case scenario. 1/

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  14. Retweeted
    2 Oct 2019

    do you own a server that doesn't support TLS 1.2+? check out this update from on warning UI that might affect your site in Chrome 80:

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  15. Retweeted
    24 Sep 2019

    Graph of the day

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  16. Retweeted
    6 Sep 2019

    Just priceless. An estimated 20% of genetic research papers contain errors because Excel converted some gene names into calendar dates.

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  18. Retweeted
    19 Aug 2019

    We can add privacy to hardware that's already shipped! I'm pretty excited about the implications of 's zero-knowledge U2F attestation demo.

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  19. 10 Aug 2019

    Username (and password) free login with security keys

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  20. Retweeted
    15 Jul 2019

    Announcing my next book: BPF Performance Tools: Linux System and Application Observability, for which I developed over 100 new tools

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