Chelsea Komlo

@chelseakomlo

Cryptography and privacy researcher.

chelseakomlo.com
Geregistreerd in mei 2009
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  1. 25 okt.

    The answer is literally always polynomials

    Als antwoord op @Zac_Aztec
    Reed - Solomon code: Polynomial Zero-Knwoledge Proof Systems: Polynomials Secret Sharing: Polynomial Evaluations Identity Testing: Polynomials equal? FFTs: Polynomials FRI: FFTs-> Polynomials SNARK: Polynomials STARK: SNARK Security Parameter: Polynomial Lagrange: Polynomial
    3 antwoorden 5 retweets 44 vind-ik-leuks
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  2. heeft geretweet
    24 okt.
    Als antwoord op

    If you’re interested in what is known, I remember this survey being a good summary, at least as of a few years ago

    2 retweets 5 vind-ik-leuks
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  3. heeft geretweet
    24 okt.

    This is a bizarre claim that makes no sense on its face, and plays directly into the hands of the vehemently anti-encryption UK Home Office and US FBI/DOJ. If users in repressive countries don't have good encryption, that makes it *easier* for their governments to spy on them.

    This is deeply bizarre of - she is arguing that if Facebook willingly surrenders its ability to spy on user content — including on behalf of, say, the Chinese Government — then it cannot protect those users *FROM* the Chinese Government.
    Deze collectie tonen
    3 antwoorden 86 retweets 186 vind-ik-leuks
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  4. heeft geretweet
    22 okt.

    Censorship infrastructure in Russia. Great reporting on the current situation

    14 retweets 18 vind-ik-leuks
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  5. 21 okt.

    Happy !!

    If you have thought about using more encrypted apps or services, today is a great day to .
    6 retweets 11 vind-ik-leuks
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  6. heeft geretweet
    18 okt.

    Have you put your online security and privacy back into your hands yet? Pledge to to end-to-end encrypted products or services.

    18 retweets 17 vind-ik-leuks
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  7. heeft geretweet
    20 okt.

    Solid reporting on geofencing in Louisville, KY. Seems that so far the police aren’t using geofencing frivolously, but it is not the power tool you might think. Meaning that lots of innocent people are caught in the net, without a suspect being found.

    2 antwoorden 6 retweets 9 vind-ik-leuks
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  8. heeft geretweet
    17 okt.

    Tell Congress: The Fourth Amendment is not for sale. Your Senators and Representatives need to hear that the government should be barred from purchasing personal data it would otherwise need a warrant to acquire. 

    2 antwoorden 39 retweets 86 vind-ik-leuks
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  9. heeft geretweet
    15 okt.

    I’ve been known to criticize Microsoft for having a lot of bark and not much bite when it comes to protecting Internet users’ rights. But this LinkedIn China pullout is a serious move and they are to be congratulated.

    7 antwoorden 50 retweets 166 vind-ik-leuks
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  10. heeft geretweet
    15 okt.

    A new white paper on the risks of client-side scanning, by Hal Abelson, , Josh Benaloh, , , Whit Diffie, Susan Landau, Peter Neumann, Ron Rivest, Jeff Schiller, , , and , and myself:

    9 antwoorden 132 retweets 269 vind-ik-leuks
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  11. 14 okt.

    I was told that I buried an important detail here, so here it is! The performance improvements shown in this new work by Elizabeth Crites, myself, and Mary Maller will be incorporated into the next FROST CFRG draft update.

    Most interestingly, our proof techniques allow us to prove *more efficient* variants of MuSig2 and FROST; we are able to reduce the number of group operations from linear in the number of signers to constant. The schemes we prove are the most efficient to date in the literature
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    2 retweets 12 vind-ik-leuks
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  12. 13 okt.

    I'm excited to see how these techniques can be used in the future to prove the security of extensions to Schnorr multi and threshold signatures, such as privacy-preserving variants or specific implementation settings.

    7 vind-ik-leuks
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  13. 13 okt.

    Most interestingly, our proof techniques allow us to prove *more efficient* variants of MuSig2 and FROST; we are able to reduce the number of group operations from linear in the number of signers to constant. The schemes we prove are the most efficient to date in the literature

    2 antwoorden 1 retweet 21 vind-ik-leuks
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  14. 13 okt.

    Proofs of security for these schemes in the past had subtle bugs by overlooking a concurrent adversary. Existing proofs that do consider concurrent adversaries are extremely complex, and so having a simplified framework ensures that thoughtful analysis/review is easier to provide

    1 antwoord 1 retweet 16 vind-ik-leuks
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  15. 13 okt.

    Proving the security of Schnorr multi/threshold signatures is notoriously difficult (due to concurrency). We just put out new work on improved techniques to prove security of these schemes, and use these techniques to prove the security of MuSig2 and FROST

    5 antwoorden 27 retweets 104 vind-ik-leuks
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  16. 13 okt.

    Happy !!

    Happy recognizing the contributions of a STEM pioneer and personal hero. captured an Ada quote I love: “Imagination is the Discovering Faculty…It is that which penetrates into the unseen worlds around us, the worlds of Science.”
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  17. heeft geretweet
    9 okt.

    Take everything you know about online trolls, abusers, brigaders, spammers, and coordinated inauthentic behavior-ers. Then think about how those people can (and do, and will even more if we screw this up) weaponize the systems where users flag content for removal.

    Als antwoord op @skywalkerbeth @jkosseff
    For a sense of how often things would be inaccurately flagged as false, here are the 52%, representing 2 million and counting, false reports to Google under EU Right to Be Forgotten law. And that’s in a system with careful human review to deter abuse.
    6 antwoorden 63 retweets 185 vind-ik-leuks
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  18. heeft geretweet
    8 okt.

    I don’t care if Facebook goes down but if Overleaf dies I’m walking into the sea.

    8 antwoorden 9 retweets 156 vind-ik-leuks
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  19. heeft geretweet
    7 okt.

    Singapore passes foreign interference law allowing authorities to block internet content ht

    3 retweets 3 vind-ik-leuks
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  20. heeft geretweet
    6 okt.

    Have you ever wondered why Threshold ECDSA is painful, Threshold Schnorr is straightforward, and Threshold BLS is trivial? Here's an informal explanation:

    3 antwoorden 24 retweets 103 vind-ik-leuks
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