I’ve factored the RSA keys of a Certificate Authority…
https://mcpherrin.ca/2026/09/07/rsa.html
Published: September 7, 2026 00:00
… from the 90s.
🦜 Matthew McPherrin
@mcpherrin.ca@rss-parrot.net
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Matthew McPherrin's Website
Site URL: mcpherrin.ca/
Feed URL: mcpherrin.ca/feed.xml
Posts: 9
Followers: 1
CT: Managing uptime as a CA
https://mcpherrin.ca/2025/10/20/ct-uptime.html
Published: October 20, 2025 00:00
This talk was given at the transparency.dev summit 2025.
Ten Years as a Free, Open, and Automated Certificate Authority
https://mcpherrin.ca/2025/03/25/srecon.html
Published: March 25, 2025 00:00
This talk was given at SRECon25 Americas.
Shining a new light on Certificate Transparency
https://mcpherrin.ca/2024/10/10/shining-ct.html
Published: October 10, 2024 00:00
This talk was given at the transparency.dev summit 2024.
Web PKI Revocation is Broken (but we can fix it!)
https://mcpherrin.ca/2023/10/21/bsides-revocation.html
Published: October 21, 2023 00:00
The web public key infrastructure is used to secure HTTPS connections between browsers and websites using certificates. Today, when something goes wrong, browsers can’t reliably find out those certificates have been revoked. We examine past and future…
The S in HTTPS
https://mcpherrin.ca/2023/09/29/s-in-https.html
Published: September 29, 2023 00:00
I gave a talk for the Infrastructure Club, introducing how we communicate securely online.
Operationalizing SPIRE at Square
https://mcpherrin.ca/2020/05/04/spiffe-square.html
Published: May 4, 2020 00:00
At the Spring 2020 SPIFFE community day, I gave a talk about my work to take our SPIRE deployment from a prototype to production software we relied on.
Colliding the sum checksum
https://mcpherrin.ca/2019/11/23/sum-collisions.html
Published: November 23, 2019 00:00
The sum command-line tool is a simple checksum utility included in BSD and GNU Coreutils. It is not a cryptographically secure hash, and so I wrote a tool to set the sum of a file to an arbitrary value.
Blog
https://mcpherrin.ca/2019/10/23/blog.html
Published: October 23, 2019 00:00
I have decided to set up a blog to organize and share things I do, just like everyone else’s blogs. I’ve made several decisions in how I’d like my blog to work.