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nora

@nora.bsky.social
307 followers 66 following 60 posts

Engineer and Applied Cryptographer working in the ASML at Harvard’s BKC. Led cryptography R&D at Juicebox and privacy projects at Signal. Passionate about fostering inclusive communities, mentoring women in tech, and building third spaces for creatives.

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Reposted by nora
Andy Greenberg @agreenberg.bsky.social · 11/06/2026
Developers from Signal (including its protocol's co-creator) along with Microsoft and Harvard unveil Encrypted Spaces, an open-source codebase for a new generation of private collaboration apps. Think Slack, Discord, Google Docs, all end-to-end encrypted. www.wired.com/story/signal...
wired.com
Signal Alums Reveal ‘Encrypted Spaces,’ a System for Making Private Collaboration Apps
The new open-source project could serve as the basis for a future of apps with features as complex as Slack, Discord, or Google Docs—but with added protection against surveillance.
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nora @nora.bsky.social · 11/06/2026
Proud to finally share what I've been working on. I'm excited for a future where privacy is normal. encryptedspaces.org
wired.com
Signal Alums Reveal ‘Encrypted Spaces,’ a System for Making Private Collaboration Apps
The new open-source project could serve as the basis for a future of apps with features as complex as Slack, Discord, or Google Docs—but with added protection against surveillance.
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nora @nora.bsky.social · 13/12/2025
this is terrible, and yet sadly so common. we need a standardized system for ownership over our digital IDs so big tech companies can’t just flip an off switch for your whole digital life (working on it, but it’s a long road). google, microsoft, etc doing this everyday too and users have no recourse
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Emily C. Hughes @emilyhughes.bsky.social · 09/11/2025
pre-writing a devastating obituary for your enemy is god-tier hating of a kind you don’t often see anymore. renaissance haterism. beautiful stuff.
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Art by Emily K @museum.of.emilyk.art · 26/10/2025
"Tzefardea Tzedek" (Frog of Righteousness) As soon as the Portland Frog became a meme, Jewish social media blew up with jokes about the 2nd Passover plague - tzefarde'a (frogs) - and the Rabbinical commentary around it. I knew I had to make a calligraphy piece encompassing all of it. (more in alt.)
Hebrew calligraphy in dark green stretches in lines across the image. Negative space makes room for a simple representation of an inflatable frog costume with a blue bandana. That shape consists of the English translation of the Hebrew, in a lighter green, and in much smaller text.
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Famously, the Egyptian tyrant causes Egypt to be overrun with frogs because he refuses to free the Hebrew people, but there are additional details that make this a fun one to ponder. For one, the Hebrew says "the frog came up" - ONE frog - even though the rest of the time it says "frogs." So there are a few explanations rabbis have come up with to explain this. One is that a single frog multiplied to create swarms. A more creative explanation is that there was a singular giant frog who traveled and brought destruction. Jewish social media was sharing videos of the Portland Frog protester with the caption, "One Big Frog! One Big Frog!" Of course the frog protesters did multiply, and many were seen in crowds all over the world on "No Kings" Day. This calligraphic work takes the verses addressing the frog plague and combines them to form a simple rendering of the Portland Frog protester. The frog figure itself is made up of the English translations of the Hebrew around it. At the bottom left my signature is in the shape of a lily pad.
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Chanda Prescod-Weinstein 🌌 @chanda.blacksky.app · 02/09/2025
NASA scheduled a major workshop for early career researchers during the most important week of the Jewish calendar, during two of the most important days of that week and expects me to accept that this was “difficult scheduling conflicts” That’s what casual antisemitism sounds like
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Emily Hunt @emily.space · 15/08/2025
I really dislike how science has started calling almost any fancy computational technique AI. 🧪 The framing of this entire article makes it sound like a benevolent AI independently made these drugs. That is *pure fantasy*. Instead: a team of scientists made a machine learning model for a study.

Article on BBC news. 
Title: AI designs antibiotics for gonorrhoea and MRSA superbugs
Description: Two new potential drugs have been designed by AI to kill drug-resistant bacteria, in a major Massachusetts Institute of Technology study.
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Emily Nussbaum @emilynussbaum.bsky.social · 05/08/2025
When I die, please do not write an AI obituary of me *or* code an AI replica, however well-intentioned, but feel free to build a shockingly realistic rotini sculpture & then eat it at my shiva
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Rabbi Emily Cohen @thatrabbicohen.bsky.social · 03/08/2025
The fate of ordinary Gazans trapped by Israel in a war zone and ordinary Israelis held hostage by Hamas in a war zone will be one and the same. They are starving. They are buried beside one another. They are cast aside by those with power to save them. For this we weep.
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Abby Chava Stein @abbystein.bsky.social · 03/08/2025
Read this in full. I'm short: The ADL has fully given up on its mission to fight real antisemitism. Instead, they are focused on unconditional support towards Israel, including justification of antisemitism if it serves that goal. Plus, working with fascists & antisemitic groups and people.
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Margaret Mitchell @mmitchell.bsky.social · 01/08/2025
🤖 Always on the lookout for potential net positive uses of “AI”, esp for elderly…but the claims here pissed me right off: “There was no way that we could have found enough songwriters out there to be able to create those tracks in an authentic way” 🚫 No. MANY musicians [wc]ould do this. And, 🧵
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Kendra Albert @kendraserra.bsky.social · 30/06/2025
As a Jewish person who worked at Harvard for 7 years, including much of the period covered by the Department of Ed. investigation, I object deeply to this retaliatory bullshit being laundered as on my behalf. www.ed.gov/about/news/p...
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Abby Chava Stein @abbystein.bsky.social · 22/06/2025
I have been using the em dash for about 10 years (I only learned English 13 years ago, for context). I even got a whole book I published before ChatGPT to prove it. I am not stopping—too useful!
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Matthew Green @matthewdgreen.bsky.social · 09/06/2025
I wrote a bit more about X’s new encrypted DMs and the Juicebox protocol. blog.cryptographyengineering.com/2025/06/09/a...
blog.cryptographyengineering.com
A bit more on Twitter/X’s new encrypted messaging
Matthew Garrett has a nice post about Twitter (uh, X)’s new end-to-end encryption messaging protocol, which is now called XChat. The TL;DR of Matthew’s post is that from a cryptographic…
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Matthew Garrett @mjg59.eicar-test-file.zip · 06/06/2025
This is just a flat out lie and everyone involved is either malicious or incompetent
Screenshot of a dialog from Twitter. It says:

"Messages are now fully encrypted

End-to-end encryption: messages are end-to-end encrypted across all your devices.

State-of-the-art privacy: There's no way for anyone, including X, to read your messages.

Set up a passcode: In order to secure your messages, you'll need to set up a 4-digit passcode."
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nora @nora.bsky.social · 06/06/2025
I'd argue it's less than not great, it's bad. Since they're not using HSMs for Juicebox, and they control all the realms, they have the ability to easily brute force anyone's 4-digit PIN and get their stored secret. It's basically just backdoored.
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nora @nora.bsky.social · 06/06/2025
If your DMs are “encrypted” but one org holds all the keys, you haven’t distributed trust – you’ve built a backdoor. Juicebox only works when boundaries are real. Separation isn’t optional. Replication != distribution.
juicebox.xyz
Don’t Put All Your Juice in One Box
At Juicebox, we believe key recovery should be secure, user friendly, and actually… work. That means it has to be more than cryptographic theater. It has to reflect the real world, where systems get h...
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nora @nora.bsky.social · 02/05/2025
We are truly living in the worst world. Who asked to have AI monitor every aspect of their digital lives, by default? These features should be opt-in, not out. If you can even justify their existence at all.
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Emily Greenwald @emilymbgreenwald.bsky.social · 28/04/2025
A dragon emerges from an egg, within a nest among others waiting to hatch atop a majestic castle. The dragon is embedded with a DragonRNA, a DNA strand covalently extended with an RNA tail. Variants of precursor DNAs are backlit by a glowing polymerase within each egg,
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nora @nora.bsky.social · 24/04/2025
Incredibly proud of the brilliant work Emily has done – these little monsters have so much potential in RNA therapeutics! So glad it’s finally in the world. It was a privilege to help with some figures and artistic renderings (spot the dragon flying through the abstract!). Mazel tov to all involved!
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Dr Abeba Birhane @abeba.blacksky.app · 23/04/2025
let’s be clear that personalisation amounts to determining a person’s future based on recurring patterns of the past. if you belong to a groups that society has not been kind to in the past (black & brown, LGBTQI, poor, disabled, etc), AI personalisation ensures your future encodes past injustice
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Matthew Green @matthewdgreen.bsky.social · 27/03/2025
Ok, look people: Signal as a *protocol* is excellent. As a service it’s excellent. But as an application running on your phone, it’s… an application running on your consumer-grade phone. The targeted attacks people use on those devices are well known.
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Rabbi Emily Cohen @thatrabbicohen.bsky.social · 25/03/2025
Niche adorableness (if you get this you’re my people): Teaching 6th graders at Hebrew school. A passage has the word “mitzvah.” 6th grader interrupts lesson to excitedly yell “wait the commandments are GIRLS.” After a beat they continue: “the Torah is a GIRL! Who run the world?! Girls!”
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nora @nora.bsky.social · 25/03/2025
Having been on the inside, I can say: the Signal Foundation is in a tough spot. It’s an unstable balancing act – and I’m not sure they’re prepared for what’s coming.
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Matthew Green @matthewdgreen.bsky.social · 25/03/2025
Signal was designed to be a consumer-grade messaging app. It’s really, really good for that purpose. And obviously “excellent consumer grade” has a lot of intersection with military-grade cryptography just because that’s how the world works. But it is being asked to do a lot!
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nora @nora.bsky.social · 23/03/2025
Before you travel, minimize risk: • Encrypt your devices (FileVault, BitLocker, etc) • Backup + sanitize data (assume others may access it) • Power OFF your devices to ensure full disk encryption is active This gives you the best chance of keeping your data safe, even if your devices are seized.
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rev. howard arson @theophite.bsky.social · 22/03/2025
anyway, this is Curtis Yarvin talking expressly about the motivation underlying the Trump Pentagon's shift to drone-centric warfare: they want a cryptographically verifiable thousand-year reich which excludes the possibility of popular revolt or democracy forever.
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nora @nora.bsky.social · 14/03/2025
Purim reminds us that resilience and joy go hand in hand. The world is uncertain, but at least we get cookies (made with @emilymbgreenwald.bsky.social!). Chag Purim Sameach!
Four hamantaschen arranged on a clear plate. Two have chocolate filling and two have apricot jam filling. Colorful rainbow sprinkles are visible in the cookies.
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nora @nora.bsky.social · 13/03/2025
Double Union was my home away from home in SF, and it was a pleasure to help run it for the last ~6 years! DU’s not just a makerspace, but a vital community space that helps spark creativity, friendship, and a feeling of safety and belonging that such spaces often lack. Donate if you can ❤️
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Matthew Green @matthewdgreen.bsky.social · 01/03/2025
One of the things I’ve come to appreciate being with privacy folks this week is how unique Signal is at this moment. I know it’s maybe a cliche at this point, but it needs to be said.
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Rabbi Jill Zimmerman @rabbijill.bsky.social · 27/02/2025
Some days, it’s just hard to be a human. The world cries out in pain, justice is sidelined & it’s scary & maddening. So we cry & then get back up again to fight for what’s right, & to protect the vulnerable. Because that’s what humans do when humanity works. The job falls to all of us.
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BlackJew 🏳️‍⚧️ @blackjew.bsky.social · 23/02/2025
This is so right on. YOU CANNOT PASS LAWS TO STOP THIS. This is an information and persuasion fight for the future. And you need to cut through the absence of a public square. Most people are getting a few headlines on social media and on local TV. You need spectacle and paid advertising.
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Mike Masnick @masnick.com · 14/02/2025
Incredible.
Screenshot of the DOGE.gov site showing someone inserted "This is a joke of a .gov site" into a page saying "Meet the U.S. Government."
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Abby Chava Stein @abbystein.bsky.social · 13/02/2025
I am proud to join over 350 rabbis and cantors, plus a long list (and growing) of Jewish creatives to sign on to an ad in the @nytimes.com crying out against the president’s (ימ"ש) call for the removal of all Palestinians from Gaza. #SayNoToEthnicCleansing #GazaIsNotForSale 1/
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Ahmed Zidan @zidan.bsky.social · 11/02/2025
💘 Psst ... We have something super cute for #ValentinesDay: A @signal.org sticker pack, created by @freedom.press and our friends at Calyx Institute 🔗 Download it and send it to your loved ones to signal your love (pun intended): signal.art/addstickers/... 🖨️ version: freedom.press/valentinesday
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Ciaran Martin @ciaranm.bsky.social · 08/02/2025
I’m on BBC Radio 4’s Today programme (c1hr18:30) talking about @joemenn.bsky.social’s scoop that 🇬🇧 gov’t has apparently ordered Apple to unlock encrypted cloud services I try to explain why, as well as provoking a needless 🇺🇸backlash, it probably can’t even work 1/4 www.bbc.co.uk/sounds/play/...
bbc.co.uk
Today - 08/02/2025 - BBC Sounds
Including Sports Desk, Weather and Thought for the Day.
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Anthony Michael Kreis @anthonymkreis.bsky.social · 05/02/2025
We’re all going to die.
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Rabbi Jill Zimmerman @rabbijill.bsky.social · 05/02/2025
ALLS I CAN SAY is omg. What a bad idea. Feel free to pick the context...
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Meredith Whittaker @meredithmeredith.bsky.social · 04/02/2025
Thinking about this classic recently, which is available free here: monoskop.org/images/d/df/...
Cover of Electronic Civil Disobedience and Other Unpopular Ideas by Critical Art Ensemble.
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nora @nora.bsky.social · 04/02/2025
Use disappearing messages so chats don’t linger at rest. Power off your phone before situations where you might lose possession (security checkpoints, protests). Before first unlock, phones are encrypted, minimizing data access without a PIN and disabling biometric unlock, which could be forced.
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ashley fairbanks @ziibiing.com · 03/02/2025
It would be nice if people could stop acting like DEI is an only a moral good. DEI strengthens organizations. People from diverse backgrounds bring new ways of solving problems and serving people. DEI isn’t a gift to diverse people. It’s a gift to the orgs that hire us.
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nora @nora.bsky.social · 31/01/2025
Contacting elected officials is a cornerstone of democracy (whether you are expressing disagreement or gratitude). Yet, the new whitehouse.gov has removed all ways to reach the President or administration – channels that existed even in his prior term. This is unprecedented in the digital age.
whitehouse.gov
The White House
President Donald J. Trump and Vice President JD Vance are committed to lowering costs for all Americans, securing our borders, unleashing American energy dominance, restoring peace through strength, a...
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matt @mattxiv.bsky.social · 30/01/2025
there is a very specific name for the type of person who’d think holocaust remembrance day is “woke”. i wish i could recall what that is.
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nora @nora.bsky.social · 09/04/2024
For the past year, I've been creating Juicebox, an open-source encryption key recovery system that provides high security coupled with a user-friendly design, to make encryption further accessible to larger numbers of people. I'd love to know what you think!
juicebox.xyz
Key to Simplicity: Squeezing the hassle out of encryption key recovery
Cryptography transforms the impossible task of safeguarding extensive data transmitted and stored across numerous systems and networks into the simpler task of securing a small singular key in one loc...
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