Christopher Patton
@cjpatton.bsky.social
cjpatton.net - opinions are my own
Anonymous credentials are going to have a big year. In the realm of "fancy" cryptography, they're perhaps the most important primitive we'll need to make PQ. Where do we stand? Lena Heimberger spent part of the summer finding out.
blog.cloudflare.com/pq-anonymous...
blog.cloudflare.com/pq-anonymous...
Policy, privacy and post-quantum: anonymous credentials for everyone
The world is adopting anonymous credentials for digital privacy, but these systems are vulnerable to quantum computers. This post explores the cryptographic challenges and promising research paths tow...
blog.cloudflare.com
October 31, 2025 at 2:05 PM
Anonymous credentials are going to have a big year. In the realm of "fancy" cryptography, they're perhaps the most important primitive we'll need to make PQ. Where do we stand? Lena Heimberger spent part of the summer finding out.
blog.cloudflare.com/pq-anonymous...
blog.cloudflare.com/pq-anonymous...
Web servers need better tools to manage agentic traffic. Fortunately, we can build these tools in a way that protects the privacy of the human in the loop.
blog.cloudflare.com/private-rate...
blog.cloudflare.com/private-rate...
Anonymous credentials- rate-limiting bots and agents without compromising privacy
As AI agents change how the Internet is used, they create a challenge for security. We explore how Anonymous Credentials can rate limit agent traffic and block abuse without tracking users or compromi...
blog.cloudflare.com
October 31, 2025 at 1:50 PM
Web servers need better tools to manage agentic traffic. Fortunately, we can build these tools in a way that protects the privacy of the human in the loop.
blog.cloudflare.com/private-rate...
blog.cloudflare.com/private-rate...
The road ahead is long, but we have a plan to get PQ signatures into TLS. Let me know what you think, or come yell at us at the PLANTS BoF at IETF next week!
Keeping the Internet fast and secure- introducing Merkle Tree Certificates
Cloudflare is launching an experiment with Chrome to evaluate fast, scalable, and quantum-ready Merkle Tree Certificates, all without degrading performance or changing WebPKI trust relationships.
blog.cloudflare.com
October 29, 2025 at 1:04 AM
The road ahead is long, but we have a plan to get PQ signatures into TLS. Let me know what you think, or come yell at us at the PLANTS BoF at IETF next week!
Reposted by Christopher Patton
Looking to improve auditability of Web applications blog.cloudflare.com/improving-th...
Improving the trustworthiness of Javascript on the Web
Today, there's no way to audit a site’s client-side code as it changes, making it hard to trust sites that use cryptography. We preview a specification we coauthored that adds auditability to the web.
blog.cloudflare.com
October 16, 2025 at 3:10 PM
Looking to improve auditability of Web applications blog.cloudflare.com/improving-th...
Reposted by Christopher Patton
Classic Star Trek moments that should definitely be made into Magic the Gathering cards 🧵
September 27, 2025 at 3:03 PM
Classic Star Trek moments that should definitely be made into Magic the Gathering cards 🧵
Reposted by Christopher Patton
The bad guy's plan falls apart because it relies on tricking the crew to fire on a helpless ship. Picard may not have memories, but he still has morals.
"I do not fire on defenseless people" should be the absolute floor for ethics in military leadership, but the 1990's were a different time
"I do not fire on defenseless people" should be the absolute floor for ethics in military leadership, but the 1990's were a different time
September 27, 2025 at 2:34 PM
The bad guy's plan falls apart because it relies on tricking the crew to fire on a helpless ship. Picard may not have memories, but he still has morals.
"I do not fire on defenseless people" should be the absolute floor for ethics in military leadership, but the 1990's were a different time
"I do not fire on defenseless people" should be the absolute floor for ethics in military leadership, but the 1990's were a different time
Reposted by Christopher Patton
Reposted by Christopher Patton
I assume this happened to all of you.
September 23, 2025 at 7:26 PM
I assume this happened to all of you.
Reposted by Christopher Patton
"Lack of scalability is enough for Cloudflare to disqualify QKD outright: if a technology can’t bring security to the whole Internet, we’re not going to spend much time on it."
blog.cloudflare.com/you-dont-nee...
blog.cloudflare.com/you-dont-nee...
You don’t need quantum hardware for post-quantum security
Post-quantum cryptography protects against quantum threats using today’s hardware. Quantum tech like QKD may sound appealing, but it isn’t necessary or sufficient to secure organizations.
blog.cloudflare.com
September 19, 2025 at 2:28 PM
"Lack of scalability is enough for Cloudflare to disqualify QKD outright: if a technology can’t bring security to the whole Internet, we’re not going to spend much time on it."
blog.cloudflare.com/you-dont-nee...
blog.cloudflare.com/you-dont-nee...
Reposted by Christopher Patton
Last days of summer scenes, Kenai River Alaska.
September 1, 2025 at 9:34 PM
Last days of summer scenes, Kenai River Alaska.
Reposted by Christopher Patton
Even the strongest among us feel weak at times. Even the smartest of us feel stupid at times. Even the most confident feel doubt. There is no shame in feeling that you are not always at your best. A true warrior feels these things, but strives for better. That way lies glory.
September 1, 2025 at 10:50 PM
Even the strongest among us feel weak at times. Even the smartest of us feel stupid at times. Even the most confident feel doubt. There is no shame in feeling that you are not always at your best. A true warrior feels these things, but strives for better. That way lies glory.
Hey, fuck you Ticketmaster.
August 27, 2025 at 2:21 AM
Hey, fuck you Ticketmaster.
When's the next protest, gang?
August 12, 2025 at 12:20 AM
When's the next protest, gang?
Reposted by Christopher Patton
ENGINEERING FRIENDS: This could turn out to be one of the most important jobs for the fate of Democracy. If you're a talented Engineering Manager and personally driven by mission for the betterment of America and the world, we need SecureDrop to remain a world-class product. Good peeps at FPF.
Job Description
Defending press freedom for the next generation
freedom.press
June 28, 2025 at 6:58 PM
ENGINEERING FRIENDS: This could turn out to be one of the most important jobs for the fate of Democracy. If you're a talented Engineering Manager and personally driven by mission for the betterment of America and the world, we need SecureDrop to remain a world-class product. Good peeps at FPF.
We're falling behind
If you aren’t familiar, Terence Tao is a Fields Medalist and arguably the most prominent and accomplished mathematician of his generation.
No one is safe, basically. The current administration will use any excuse to burn it all to the ground.
No one is safe, basically. The current administration will use any excuse to burn it all to the ground.
For the math folks on here: NSF has suspended Terry Tao's grant. www.nsf.gov/awardsearch/...
August 2, 2025 at 11:31 PM
We're falling behind
Reposted by Christopher Patton
If you aren’t familiar, Terence Tao is a Fields Medalist and arguably the most prominent and accomplished mathematician of his generation.
No one is safe, basically. The current administration will use any excuse to burn it all to the ground.
No one is safe, basically. The current administration will use any excuse to burn it all to the ground.
For the math folks on here: NSF has suspended Terry Tao's grant. www.nsf.gov/awardsearch/...
NSF Award Search: Award # 2347850
Structure theory for measure-preserving systems, additive combinatorics, and correlations of multiplicative functions
www.nsf.gov
August 1, 2025 at 5:14 PM
If you aren’t familiar, Terence Tao is a Fields Medalist and arguably the most prominent and accomplished mathematician of his generation.
No one is safe, basically. The current administration will use any excuse to burn it all to the ground.
No one is safe, basically. The current administration will use any excuse to burn it all to the ground.
My favorite slide from PETS so far
July 17, 2025 at 1:41 PM
My favorite slide from PETS so far
Reposted by Christopher Patton
We updated our paper on Fiat-Shamir!
We now take a closer look at the gap between what symmetric cryptography has focused on for over 10 years (indifferentiability) and what is actually needed for the soundness of ZKPs and SNARKs (something stronger!).
eprint.iacr.org/2025/536
We now take a closer look at the gap between what symmetric cryptography has focused on for over 10 years (indifferentiability) and what is actually needed for the soundness of ZKPs and SNARKs (something stronger!).
eprint.iacr.org/2025/536
A Fiat–Shamir Transformation From Duplex Sponges
We analyze a variant of the Fiat–Shamir transformation based on an ideal permutation. The transformation relies on the popular duplex sponge paradigm, and minimizes the number of calls to the permutat...
eprint.iacr.org
July 15, 2025 at 6:08 AM
We updated our paper on Fiat-Shamir!
We now take a closer look at the gap between what symmetric cryptography has focused on for over 10 years (indifferentiability) and what is actually needed for the soundness of ZKPs and SNARKs (something stronger!).
eprint.iacr.org/2025/536
We now take a closer look at the gap between what symmetric cryptography has focused on for over 10 years (indifferentiability) and what is actually needed for the soundness of ZKPs and SNARKs (something stronger!).
eprint.iacr.org/2025/536
Reposted by Christopher Patton
This evening there's an important webinar about the attempts to codify cuts to everything from global health to NPR: us02web.zoom.us/webinar/regi...
Welcome! You are invited to join a webinar: From UNICEF to NPR: Trump’s Cuts End Here: A Town Hall to Defend Global Health and Public Media. After registering, you will receive a confirmation email ab...
Welcome! You are invited to join a webinar: From UNICEF to NPR: Trump’s Cuts End Here: A Town Hall to Defend Global Health and Public Media. After registering, you will receive a confirmation email ab...
us02web.zoom.us
July 14, 2025 at 1:59 PM
This evening there's an important webinar about the attempts to codify cuts to everything from global health to NPR: us02web.zoom.us/webinar/regi...
Reposted by Christopher Patton
Relaxing Tea Better Fucking Work
theonion.com/relaxin...
theonion.com/relaxin...
July 14, 2025 at 2:00 PM
Relaxing Tea Better Fucking Work
theonion.com/relaxin...
theonion.com/relaxin...
Reposted by Christopher Patton
Slides of my talk titled "Lattices give us KEMs and FHE, but where are the efficient lattice PETs? -- By Example of (Verifiable) Oblivious PRFs" given at spiqe-workshop.github.io are here: github.com/malb/talks/b...
Thanks @kennyog.bsky.social and @jurajsomorovsky.bsky.social for inviting me.
Thanks @kennyog.bsky.social and @jurajsomorovsky.bsky.social for inviting me.
github.com
June 24, 2025 at 9:56 AM
Slides of my talk titled "Lattices give us KEMs and FHE, but where are the efficient lattice PETs? -- By Example of (Verifiable) Oblivious PRFs" given at spiqe-workshop.github.io are here: github.com/malb/talks/b...
Thanks @kennyog.bsky.social and @jurajsomorovsky.bsky.social for inviting me.
Thanks @kennyog.bsky.social and @jurajsomorovsky.bsky.social for inviting me.
Good luck today, Googlers
June 12, 2025 at 7:26 PM
Good luck today, Googlers