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Sophie Schmieg

@sophieschmieg.infosec.exchange.ap.brid.gy
382 followers 1 following 261 posts

Leading cryptography (ISE Crypto) at Google. Opinions my own. Content usually badly explained mathematics [bridged from infosec.exchange/@sophieschmieg on the fediverse by fed.brid.gy ]

PostsRepliesMedia
Sophie Schmieg @sophieschmieg.infosec.exchange.ap.brid.gy · 20/10/2026
Considering offering HSM services to CAs.
A dice bag with a full set of D&D dice in pink and black. 

This is the travel entropy I keep on my person at all times, for exactly this kind of emergency.
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Sophie Schmieg @sophieschmieg.infosec.exchange.ap.brid.gy · 28/09/2026
"It's the kids that are wrong" meme with top caption reading "could McEliece really be broken?" And the bottom caption reading "no, it's all the other cryptographers that are wrong"
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Sophie Schmieg @sophieschmieg.infosec.exchange.ap.brid.gy · 26/09/2026
Outfits for the lesser known sequel to "four weddings and one funeral": "two conferences and one wedding"
Outfit for panel appearance at one of the conferences Outfit for wedding
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Sophie Schmieg @sophieschmieg.infosec.exchange.ap.brid.gy · 24/09/2026
LEGO vending machine
A LEGO vending machine at Dulles airport
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Sophie Schmieg @sophieschmieg.infosec.exchange.ap.brid.gy · 15/09/2026
I have a film shoot for two thirty second films for the company today. Also a new and extremely pink (sorry "hyacinth", we can't call things pink in the Pixel store) phone.
A picture of me in the mirror with an extremely pink phone. You might think it's only the phone cover, but the phone itself has the exact same color, and I love it. My wife is very jealous of its pinkishness.
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Sophie Schmieg @sophieschmieg.infosec.exchange.ap.brid.gy · 03/08/2026
The three energy levels of the cat atom, before excitement.
Three cats sitting on a cat tree, each occupying one level.
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Sophie Schmieg @sophieschmieg.infosec.exchange.ap.brid.gy · 23/07/2026
You can now download the spec for ML-KEM over a connection secured with ML-KEM. An honor it shares with I guess SP 800 38D, and, if you change ClientHello, P256. And also RFC 7748, if you want to extend it further. csrc.nist.gov/pubs/fips/203/final
NIST's page for ML-KEM, showing that Chrome used X25519MLKEM768 to access the website
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Sophie Schmieg @sophieschmieg.infosec.exchange.ap.brid.gy · 14/07/2026
Emma the Unflinching!
Signal conversation between me and my wife: 
@sarailet: the car wants to be named
Me: hmmm
Me: Emma the Unflinching 
@sarailet: Why Emma?
Me: so that's the part you're questioning?
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Sophie Schmieg @sophieschmieg.infosec.exchange.ap.brid.gy · 08/07/2026
Niche memes
The myth of the "consentual" KEX (key exchange) 
Client: I consent
Server: I consent
Rando: *I* don't

Isn't there somebody you forgot to ask?
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Sophie Schmieg @sophieschmieg.infosec.exchange.ap.brid.gy · 08/07/2026
I don't get why anybody is listening to Jacob Applebaum. My cat has about the same expertise in cryptography, and has never been credibly accused of sexual abuse. She's also a lot cuter.
Photo of a donut with an opening showing the pitch black interior. The void has eyes
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Sophie Schmieg @sophieschmieg.infosec.exchange.ap.brid.gy · 26/06/2026
The Deutsches Museum Thermometer has an out of bounds exception
The weather station at the Deutsches Museum, measuring 37 degrees Celsius on the floor, with the visualisation only going up to 35 degrees.
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Sophie Schmieg @sophieschmieg.infosec.exchange.ap.brid.gy · 17/06/2026
Precarious dining
Dinner table in Utrecht, right next to a channel that has no barrier to stop people from falling in
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Sophie Schmieg @sophieschmieg.infosec.exchange.ap.brid.gy · 14/06/2026
Visiting my parents and my brother's children. $30 children's toy microscopes certainly have improved a lot since I was a child.
Stinging nettle in close up. Stinging hairs are visible on the side of the leaf, ready to break off and sting someoneA small girl, her aunt, a children's toy microscope, and a laptop
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Sophie Schmieg @sophieschmieg.infosec.exchange.ap.brid.gy · 18/05/2026
Oh no Zeit, no no no.
German newspaper die Zeit, with an article called "the perfect key" on QKD."intelligence services and criminals can secretly eavesdrop on this communication. Currently it takes years to decrypt such messages, if it succeeds at all. But one could read even government cables or bank transactions"
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Sophie Schmieg @sophieschmieg.infosec.exchange.ap.brid.gy · 14/05/2026
In order to go viral on Mastodon, your post should include at least one cat and some criticism of AI. So here is Binah disliking large language models.
A mediocre picture of a black kitten, who is definitely very critical of LLMs. Or something.
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Sophie Schmieg @sophieschmieg.infosec.exchange.ap.brid.gy · 12/05/2026
Work moved to a new building. I didn't expect to take SAN damage from facilities.
New campus Cafe, named Café Au Lait. The Au is styled as the chemical symbol for gold, listing the number of protons (94) and the molecular weight 199.8u
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Sophie Schmieg @sophieschmieg.infosec.exchange.ap.brid.gy · 02/05/2026
I think I might need to check some luggage, this does want to close.
My carry-on, filled with some clothes and two black cats.
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Sophie Schmieg @sophieschmieg.infosec.exchange.ap.brid.gy · 10/04/2026
Live view of @saraislet talking to her portable battery
4 panel Padme meme: 
Anakin, as the portable battery: I'm going to charge
Padme, as @saraislet: the phone? 
Anakin: …
Padme: the phone, right?
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Sophie Schmieg @sophieschmieg.infosec.exchange.ap.brid.gy · 31/03/2026
Signal chat out of context. @paulehoffman
Signal chat message I received: 
"I get to be you this year, I believe."
"Well, maybe without the leather."
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Sophie Schmieg @sophieschmieg.infosec.exchange.ap.brid.gy · 20/03/2026
Have you licked your sister today?
Tzilah, tongue out to lick her sister, Binah.
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Sophie Schmieg @sophieschmieg.infosec.exchange.ap.brid.gy · 17/03/2026
I got my key signed by Diffie.
First half of signatureSecond half of signature
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Sophie Schmieg @sophieschmieg.infosec.exchange.ap.brid.gy · 06/03/2026
Sweet, a free upgrade to a suite!
Suite
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Sophie Schmieg @sophieschmieg.infosec.exchange.ap.brid.gy · 05/03/2026
So far, nobody seems to have concerns about flying with an inoperative cryptographer on board
Me, in the British Airways lounge, lounging along in a shirt that says INOP see t/log
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Sophie Schmieg @sophieschmieg.infosec.exchange.ap.brid.gy · 12/02/2026
Lol. Rofl, even. (Not the Onion: www.ibm.com/thought-leadership/inst…)
While 59% of executives say quantum-enabled AI will transform their industry by 2030, only 27% expect to be using quantum computing by then. This gap between quantum’s potential and industry preparation creates massive opportunity for the organizations that act decisively today.
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Sophie Schmieg @sophieschmieg.infosec.exchange.ap.brid.gy · 11/02/2026
Kipo's clever plan is sure to hide her from the cleaners!
A picture from the side, showing a black and wide tuxedo cat cowering underneathA carpet that has no unusual features at all. None. Well, there is a small, cat sized bulge, but I'm certain that doesn't mean anything
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Sophie Schmieg @sophieschmieg.infosec.exchange.ap.brid.gy · 14/01/2026
How to fix your home network: Step 1: Marry an infrastructure engineer. Step 2: Appeal to her inherent slightly furry nature. Step 3: Your home internet now works.
Text exchange between @saraislet and me:
Me:
> Because you love her ability to set boundaries?
Not all boundaries are IAM policies!
@saraislet: But yeah actually I need to add more devices to the VLAN, and fix it, because some devices shouldn't talk to each other and some devices have to, and I want another VLAN isolated from the public internets for a NAS
Me: See, the engineer inside of you needs to fix
@saraislet: But I'm just 3 smol dragons in a leather trenchcoat
Me: So, an engineer, from what I'm hearing
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Sophie Schmieg @sophieschmieg.infosec.exchange.ap.brid.gy · 05/01/2026
Got stuck at Donner pass. Anyone know any good parties around here?
Snow covered trees at Donner pass, yesterday.
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Sophie Schmieg @sophieschmieg.infosec.exchange.ap.brid.gy · 28/11/2025
Sometimes I hate living on the West Coast. Should have stayed up until after midnight, I guess.
Screenshot of the LEGO homepage, showing the U.S.S. Enterprise model, which became available today, already being on backorder at 7:30 in the morning.
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Sophie Schmieg @sophieschmieg.infosec.exchange.ap.brid.gy · 26/11/2025
Unicode normalization.
A screenshot of a shell (on Mac) executing the program ßh. Due to normalization this gets translated to ssh, and indeed the shell calls the ssh binary.
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Sophie Schmieg @sophieschmieg.infosec.exchange.ap.brid.gy · 09/11/2025
"Okay fine, you can have one of the red balls, but you need to promise to never leave again"
A black kitten with a red ball she brought over night
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Sophie Schmieg @sophieschmieg.infosec.exchange.ap.brid.gy · 04/11/2025
This might be the most Canadian beverage possible
Photograph of maple flavored sparkling water. Lest you forget you're in Canada!
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Sophie Schmieg @sophieschmieg.infosec.exchange.ap.brid.gy · 27/10/2025
Help, I'm trapped!
A fluffy black cat, sitting on my belly on top of the sheets, preventing me from legally getting up and starting my day
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Sophie Schmieg @sophieschmieg.infosec.exchange.ap.brid.gy · 20/10/2025
Don't make me take out the emergency entropy generators again. (Context: lkml.org/lkml/2025/10/17/1729)
A set of emergency entropy generators, also known as dice. These ones are transparent.
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Sophie Schmieg @sophieschmieg.infosec.exchange.ap.brid.gy · 25/09/2025
I know my wifely duties.
Screenshot of Signal chat with my wife, where I tell her about the knotting news of the discovery that the unknotting number is not additive under connected sums
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Sophie Schmieg @sophieschmieg.infosec.exchange.ap.brid.gy · 16/09/2025
Sealed data
A letter, labelled "Sophie" on my work keyboardThe other side of the letter, revealing a seal.
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Sophie Schmieg @sophieschmieg.infosec.exchange.ap.brid.gy · 10/09/2025
Binah: "Ah that's your problem right there, there are outlets that power the vacuum monster, I will fix that for you for free, no problem"
A black kitten looking up from behind the TV sound box
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Sophie Schmieg @sophieschmieg.infosec.exchange.ap.brid.gy · 21/07/2025
Meetecho mobile continues to be the most best fun part of IETF
Meetecho (the thing IETF uses for discussion during live meetings), being sorry, again.
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Sophie Schmieg @sophieschmieg.infosec.exchange.ap.brid.gy · 19/07/2025
Madrid is ready for PQC!
A building in Madrid with the letters "NTT DATA" on top
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Sophie Schmieg @sophieschmieg.infosec.exchange.ap.brid.gy · 13/07/2025
#notJerry
A llama which, as far as I know, does not administer any Mastodon servers
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Sophie Schmieg @sophieschmieg.infosec.exchange.ap.brid.gy · 15/05/2025
My sister is defending her PhD today. Unbeknownst to her, I happen to be in the region and will drop by for "moral support".
My "moral support" outfit: a shirt saying "citation needed"
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Sophie Schmieg @sophieschmieg.infosec.exchange.ap.brid.gy · 06/05/2025
Ah, yes, the two genders
Two doors, next to each other, no other doors closeby. One is labeled "Female" the other is labeled "food team"
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Sophie Schmieg @sophieschmieg.infosec.exchange.ap.brid.gy · 01/05/2025
The Google office today, celebrating Labor Day with Star Wars themed cookies
A Yoda cookie. Not displayed: left ear.
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Sophie Schmieg @sophieschmieg.infosec.exchange.ap.brid.gy · 19/04/2025
I think I put that together wrong.
Cat, in an impossible position.
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