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Chelsea Komlo

@chelseakomlo.bsky.social
1.1K followers 114 following 110 posts

(Real world) Cryptographer. chelseakomlo.com for more info.

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Chelsea Komlo @chelseakomlo.bsky.social · 26/07/2026
Looking forward to being at Science of Blockchain tomorrow! Come say hi for anyone who is there, hoping to hear about new crypto challenges and research problems :D Onwards! 💪
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Chelsea Komlo @chelseakomlo.bsky.social · 06/05/2026
Hello Rome! Excited to be at ZKProof this week and Eurocrypt, come say hi if you are here! :)
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Chelsea Komlo @chelseakomlo.bsky.social · 21/04/2026
Spring is here in nyc!
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Chelsea Komlo @chelseakomlo.bsky.social · 21/02/2026
True academic, editing slides up to the last minute 😅 Happy to be presenting Golden at today’s NY Crypto Day! eprint.iacr.org/2025/1924
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Chelsea Komlo @chelseakomlo.bsky.social · 03/02/2026
Spending the week in beautiful Okinawa at the OIST workshop on isogeny-based cryptography
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Chelsea Komlo @chelseakomlo.bsky.social · 23/01/2026
One step closer- mapping execution flow from the interactive distinguisher Z and finally understanding the dummy adversary
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Chelsea Komlo @chelseakomlo.bsky.social · 22/01/2026
My mom told me a quote today that my grandmother used to say after she would sign up for every free giveaway under the sun - “you can’t win if you don’t play.” And I kind of love that mentality for trying something in the face of overwhelming possibility of failure - generally the case in research
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Chelsea Komlo @chelseakomlo.bsky.social · 12/01/2026
Happy new year! One of my New Year’s resolutions this year is to finally finish my gentle introduction to writing proofs in UC, for myself as well.. if anyone is interested in reviewing/contributing, please let me know! 🙌
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Chelsea Komlo @chelseakomlo.bsky.social · 03/08/2025
I’m at SBC and Simon’s for the next week, looking forward to seeing everyone! Will be giving a talk on Thursday at Simon’s on our recent impossibility results on the adaptive security of threshold signatures- simons.berkeley.edu/talks/chelse...
simons.berkeley.edu
On the Adaptive Security of Key-Unique Threshold Signatures
Abstract not available.
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Chelsea Komlo @chelseakomlo.bsky.social · 15/01/2025
2025: started out with Covid, got better, then relapsed into Covid 🤦‍♀️
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Chelsea Komlo @chelseakomlo.bsky.social · 04/01/2025
Back to blue sky and happy new year!!!
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Chelsea Komlo @chelseakomlo.bsky.social · 06/07/2024
After 3 years & 12 drafts, the RFC for FROST is complete! We hope this makes implementing FROST easier with fewer bugs 🐛 Thank you to everyone who helped by reviewing FROST security, submitting comments, and implementing the draft, this was a team effort 🙌💪 www.rfc-editor.org/rfc/rfc9591....
rfc-editor.org
RFC 9591: The Flexible Round-Optimized Schnorr Threshold (FROST) Protocol for Two‑Round Schnorr Signatures
This document specifies the Flexible Round-Optimized Schnorr Threshold (FROST) signing protocol. FROST signatures can be issued after a threshold number of entities cooperate to compute a signature, ...
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John Schanck @susurrusus.bsky.social · 20/05/2024
There's a mergesort step on page 12 that is costed at N log N. So I don't think this improves on Sam Jaques' eprint 2024/080 from a theoretical perspective. Nice implementation work though!
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Alan Allport @alanallport.bsky.social · 08/04/2024
Consider donating your eclipse glasses to Eclipse Glasses USA so schoolchildren in South America can use them in October. eclipse23.com/pages/donate...
eclipse23.com
Donate Used Eclipse Glasses | Eclipse Glasses USA
Not sure what to do with your used eclipse glasses now that the October 2023 eclipse has passed? Donate them to Eclipse Glasses USA. We will send them to school children in other countries for those c...
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Chelsea Komlo @chelseakomlo.bsky.social · 05/04/2024
First podcast, check it out! :) zeroknowledge.fm/318-2/
zeroknowledge.fm
Episode 318: Threshold Signature Schemes & FROST with Chelsea Komlo - ZK Podcast
In this week’s episode, Anna and Nico chat with Chelsea Komlo, Chief Scientist for the Zcash Foundation and member of the Cryptography, Security, and Privacy lab at the University of Waterloo. They d...
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Chelsea Komlo @chelseakomlo.bsky.social · 01/04/2024
This is jaw-dropping, wild news and should be criminal techcrunch.com/2024/03/26/f...
techcrunch.com
Facebook snooped on users' Snapchat traffic in secret project, documents reveal | TechCrunch
A secret program called
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François Dupressoir @francois.dupressoir.eu · 31/03/2024
It's not a choice of one or the other. Use the appendix, as an author, to make reviewers see the value of sticky reviews and make them more likely to ask chairs to turn them on!
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Chelsea Komlo @chelseakomlo.bsky.social · 30/03/2024
If you are on a PC for an IACR conference, consider reaching out to the PC chairs to request “sticky reviews”, to allow reviews from prior submissions to IACR conferences to be visible! Let’s make science better! 💪
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Chelsea Komlo @chelseakomlo.bsky.social · 30/03/2024
I wish conferences asked papers to submit feedback received from prior submission attempts and a discussion of how the authors improved the paper since then… so much context is lost between submission attempts across different venues
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Chelsea Komlo @chelseakomlo.bsky.social · 29/03/2024
Thanks for the amazing time #RealWorldCrypto, fantastic talks and conversations as always! See you next year in Europe :)
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Chelsea Komlo @chelseakomlo.bsky.social · 25/03/2024
Changing my job title to “fancy cryptographer” thanks #RealWorldCrypto
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ePrint Updates @eprint.ing.bot · 22/03/2024
Arctic: Lightweight and Stateless Threshold Schnorr Signatures (Chelsea Komlo, Ian Goldberg) ia.cr/2024/466
Abstract. Threshold Schnorr signatures are seeing increased adoption in practice, and offer practical defenses against single points of failure. However, one challenge with existing randomized threshold Schnorr signature schemes is that signers must carefully maintain secret state across signing rounds, while also ensuring that state is deleted after a signing session is completed. Failure to do so will result in a fatal key-recovery attack by re-use of nonces.

While deterministic threshold Schnorr signatures that mitigate this issue exist in the literature, all prior schemes incur high complexity and performance overhead in comparison to their randomized equivalents. In this work, we seek the best of both worlds; a deterministic and stateless threshold Schnorr signature scheme that is also simple and efficient.

Towards this goal, we present Arctic, a lightweight two-round threshold Schnorr signature that is deterministic, and therefore does not require participants to maintain state between signing rounds. As a building block, we formalize the notion of a Verifiable Pseudorandom Secret Sharing (VPSS) scheme, and define Shine, an efficient VPSS construction. Shine is secure when the total number of participants is at least 2t − 1 and the adversary is assumed to corrupt at most t − 1; i.e., in the honest majority model.

We prove that Arctic is secure under the discrete logarithm assumption in the random oracle model, similarly assuming at minimum 2t − 1 number of signers and a corruption threshold of at most t − 1. For moderately sized groups (i.e., when n ≤ 20), Arctic is more than an order of magnitude more efficient than prior deterministic threshold Schnorr signatures in the literature. For small groups where n ≤ 10, Arctic is three orders of magnitude more efficient.
Image showing part 2 of abstract.
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Chelsea Komlo @chelseakomlo.bsky.social · 21/03/2024
Hi Toronto! Looking forward to seeing everyone at #RealWorldCrypto 🇨🇦
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Chelsea Komlo @chelseakomlo.bsky.social · 24/01/2024
I was asked today what the upper bound is on number of signers in threshold signature schemes used in practice today and I didn’t have a good answer… I’m assuming consensus schemes are larger, but does anyone know of signing groups of > 20? That seems on the larger side
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Chelsea Komlo @chelseakomlo.bsky.social · 22/01/2024
Apparently those leading the anti-diversity programs at US public universities believe “a healthy society requires patriarchy”- why in 2023 are women with voices and brains considered to be such a threat www.nytimes.com/interactive/...
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Chelsea Komlo @chelseakomlo.bsky.social · 20/01/2024
I wish there was more of a culture in cryptography of reaching out to authors to carefully double check claims before writing these claims in reviews or related work. I’ve seen *big* mistakes made- eg, by a reviewer that said my summary of my own prior work was wrong 🙃
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Ana Marie Cox @anamariecox.com · 02/01/2024
I did this. Please do this; if you are a person who can get pregnant, have them on hand. I used AidAccess.org. I have a vision for care access where people can ask other people for abortion pills the way we call out for tampons in a public restroom. Though I suppose not in a *public* restroom.
aidaccess.org
Aid Access: Abortion Pills by Mail
Aid Access will help you order abortion pills by mail. We protect the health and human rights of anyone without access to local abortion pill services.
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Natanael, Tech janitor @natanael.bsky.social · 30/12/2023
Misuse resistant cryptography, but more. I want to see takes on it from more fields, like what do data centers need from it?
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Chelsea Komlo @chelseakomlo.bsky.social · 30/12/2023
To anyone working on real-world cryptography- what would you like to see more of in cryptography research for 2024? Readable papers? Performance measurements? Accounting for specific failure cases? More PQ? Acceptance of non-standard assumptions? Solving certain problems?
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Jessica Rosenworcel @jrosenworcel.bsky.social · 03/12/2023
No women on this list. www.nytimes.com/2023/12/03/t...
nytimes.com
The Who’s Who Behind the Modern Artificial Intelligence Movement
Before chatbots exploded in popularity, a group of researchers, tech executives and venture capitalists had worked for more than a decade to fuel A.I.
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😸 Hugo the pink cat 😸 @hugothepinkcat.bsky.social · 30/11/2023
OMG Hahaha Those edit people had made to the Kissinger wiki article now appears as a featured response on the Google main page
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Chelsea Komlo @chelseakomlo.bsky.social · 29/11/2023
PSA: the security for FROST requires only OMDL/ROM assumptions; it does not require the AGM!
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Chelsea Komlo @chelseakomlo.bsky.social · 25/11/2023
Today I got to see bison and other animals at Yellowstone National Park!
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evacide @evacide.bsky.social · 20/11/2023
I am very curious to see how the White House defends this bullshit.
wired.com
Secretive White House Surveillance Program Gives Cops Access to Trillions of US Phone Records
A WIRED analysis of leaked police documents verifies that a secretive government program is allowing federal, state, and local law enforcement to access phone records of Americans who are not suspecte...
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Chelsea Komlo @chelseakomlo.bsky.social · 18/11/2023
Yubikeys but with a prompt that asks “are you sure you want to use this with this application?” first, to prevent me accidentally sending my yubikey password to the last chat in iMessage (as just happened)
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Chelsea Komlo @chelseakomlo.bsky.social · 17/11/2023
This week, my coauthor and I discovered a break in the extremely nice scheme we’ve been working on for the past four months 😭
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Joseph Lorenzo Hall, PhD @josephhall.org · 24/10/2023
"There are no "free-riding" services on the Internet; India must uphold net neutrality": a just-released open letter, with powerful quotes from AccessNow's Raman Chima and Internet Society's Neeti Biyani www.accessnow.org/press-releas...
accessnow.org
India must uphold net neutrality - Access Now
TRAI must uphold net neutrality in India by preserving non-discriminatory access to online content, applications, and services for all people.
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Chelsea Komlo @chelseakomlo.bsky.social · 21/10/2023
www.nobsbitcoin.com/fincen-wants...
nobsbitcoin.com
FinCEN Seeks to Impose Strict Surveillance Requirements onto Broadly Defined Class of 'Bitcoin Mixer...
The agency proposed designating 'crypto mixing' as an area of “primary money laundering concern" in order to impose certain recordkeeping and reporting requirements on involved transactions. The pub...
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Chelsea Komlo @chelseakomlo.bsky.social · 10/10/2023
I recently gave a talk to a cryptography reading group on the paper "To Label, or Not To Label (in Generic Groups)"- I typed my notes here for anyone interested! writing.chelseakomlo.com/a-comparison...
writing.chelseakomlo.com
A Comparison of Idealized Models
Idealized models are a useful tool for proving the security of cryptographic schemes. For example, the random oracle model (ROM) gives an idealization of crytographic hash functions, whereas the GGM a...
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Meredith Whittaker @meredithmeredith.bsky.social · 05/10/2023
Great piece on Ashton Kutcher's Thorn, which is pushing anti-privacy laws Thorn sells corp/police surveillance to "solve" child abuse & trafficking, even as service orgs & survivors question its efficacy www.thecut.com/article/ashton-kutch…
thecut.com
Who Is Ashton Kutcher’s Anti-Sex-Trafficking Org Helping?
The actor’s recent PR crisis has led to scrutiny of his complicated advocacy work.
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🦇🎃💀 Riana-mator 💀🎃🦇 @riana.bsky.social · 01/10/2023
I’m quoted in this new @sambiddle.bsky.social piece on the Heat Initiative, the advocacy org that recently spun off from the Ashton Kutcher-founded child safety org Thorn: theintercept.com/2023/10/01/a...
theintercept.com
New Group Attacking iPhone Encryption Backed by U.S. Political Dark-Money Network
The Heat Initiative, formed to attack Apple encryption in the name of stopping child abuse, is part of a political dark-money network.
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Chelsea Komlo @chelseakomlo.bsky.social · 27/09/2023
Boy math is giving performance numbers for a crypto scheme with sub-components modeled as idealized functionality and then only citations to the expensive concrete instances of that functionality
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Chelsea Komlo @chelseakomlo.bsky.social · 26/09/2023
I participated in the NIST threshold workshop today- it is a huge effort and hopefully helpful to the wider adoption of advanced crypto! I’m also happy to say that we have an *amazing* team for a FROST submission; thanks to everyone involved 🎊 💪 github.com/chelseakomlo...
github.com
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Chelsea Komlo @chelseakomlo.bsky.social · 10/09/2023
This weekend’s reading includes this beautifully written paper on the relationship between several idealized models- the ROM, Shoup’s GGM, and the generic bilinear map model (GBM) eprint.iacr.org/2021/240
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Faine Greenwood @faineg.com · 05/09/2023
cis white guys who comment on how much luggage other people are taking on business trips… you gotta remember you’re the *only* people who can reliably get professional respect while wearing a single kinda-smelly casual outfit and a single pair of shoes for a week
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Chelsea Komlo @chelseakomlo.bsky.social · 03/09/2023
Posting these a little late, but I still want to celebrate! A couple weeks ago I had the honor or receiving an early career award at Crypto ‘23 along with Mary Maller and Elizabeth Crites! 🎊🙏💪 Here’s to more to come and to collaborating with great people and great friends
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Kristi Yamaguccimane @wapplehouse.bsky.social · 27/08/2023
Ya know how women say all the time they’re afraid to come forward with something because of the fear they’ll be accused of lying and making it up?
Pop Base ©
@PopBase
The Spanish football federation announces that, instead of removing president Luis Rubiales, they will take legal action against player Jenni Hermoso as they claim she
'lied' about non-consensual kiss.
The federation also says players have an
"obligation" to play for the national team after 81 female players said they would not play until Rubiales was removed, in solidarity with Jenni Hermoso.
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str👻d @str4d.xyz · 22/08/2023
Next is the Best Early Career Paper: “Fully Adaptive Schnorr Threshold Signatures” by Elizabeth Crites, @chelseakomlo.bsky.social, and Mary Maller (eprint.iacr.org/2023/445)
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Chelsea Komlo @chelseakomlo.bsky.social · 20/08/2023
Woah earthquake !
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Chelsea Komlo @chelseakomlo.bsky.social · 18/08/2023
Hello Santa Barbara! Looking forward to Crypto :)
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