Since its inception, Let’s Encrypt has been sending expiration notification emails to subscribers that have provided an email address to us via the ACME API. This service ended on June 4, 2025. The decision to end the service is the result of the following factors: Over the past 10 years more and more of our…
I have 15+ years of software engineering experience across different parts of the tech stack including networking libraries, congestion control, performance improvements, Backend, and Android development.
Auth.js, formerly known as NextAuth.js, is now being maintained and overseen by Better Auth team
Mobile adtech juggernaut AppLovin recently faced multiple allegations of misconduct . Allegations run the gamut—privacy, ad targeting, even national security and ties to China. I was among the researchers consulted by skeptical investors this spring, and I was quoted in one of their reports, explaining my concerns…
Digital ID is a new way for users to create an ID in Apple Wallet using their U.S. passport, and present it with the privacy of iPhone or Apple Watch.
don't use anubis just to block llm scrapers
Let’s Encrypt will be reducing the validity period of the certificates we issue. We currently issue certificates valid for 90 days, which will be cut in half to 45 days by 2028. This change is being made along with the rest of the industry, as required by the CA/Browser Forum Baseline Requirements, which set the…
Ruby Central posted an extremely concerning “Incident Response Timeline” today, in which they make a number of exaggerated or purely misleading claims. Here’s my effort to set the record straight. First, and most importantly: I was a primary operator of RubyGems.org, securely and successfully, for over ten years. Ruby…
There was a recent incident where Microsoft somehow allegedly blocked a mailbox of a sanctioned individual . Any organization highly depending on MS products that might come into the crosshair should ask - can this happen to me? What would be the cost? How much I invest into prevention of this scenario? In this…
Two findings in PureVPN on Ubuntu 24.04. After a reconnect the system takes a default IPv6 route outside the tunnel, and the ip6tables OUTPUT policy is still ACCEPT, so traffic leaves in the clear while the client reports connected.
This report highlights a rarely-discussed but crucially important attack surface: security vendors themselves.
Little Snitch by Objective Development is the first app that I install on a new Mac. In fact I just bought a new Mac, an M4 MacBook Pro with nano-texture display, and I installed Little Snitch via thumb drive even before connecting the Mac to the internet. While setting up my new Mac, which came with macOS 15.2…
Jailbreaking an old Kindle and turning it into a school dashboard using Cloudflare Workers, Puppeteer, and image processing.
💡Update May 26, 2025: I've published the source code for TeleMessage Explorer: a new open source research tool I've been digging through the 410 GB of Java heap dumps from TeleMessage's archive server, provided by DDoSecrets. Here's a description of the dataset, some of my initial
Rant ahead: I hate TLS “Inspection” software with a burning passion and I wish we collectively as an industry would just knock it the fuck off and stop pretending it’s some great security benefit. Every time I encounter it, in whatever form, it’s a gigantic headache that makes everyone’s life worse off and as far as I…
Kaspersky Global Research & Analysis Team (GReAT) discovered hundreds of open source repositories with multistaged malware targeting gamers and cryptoinvestors within a new campaign that was dubbed by Kaspersky as GitVenom. The infected projects include an automation instrument for interacting with Instagram accounts…
An analysis using Process Monitor and WinDbg, dealing with JavaScript, WASM, and Windows shellcode.
I delivered my traditional Go Cryptography State of the Union talk at GopherCon US 2025 in New York. It goes into everything that happened at the intersection of Go and cryptography over the last year.
For enterprise software, the software supply chain presents some of the biggest risks today to data privacy and security.
This “feature” accomplishes nothing of value for anyone, including the streaming services, but imposes a massive (and for most people, confusing and frustrating) hindrance on honest people simply trying to easily capture high-quality (as opposed to, say, using their damn phone to take a photograph of their reflective…
Interesting things about passkeys in webauthn
A “distrust” is when a certification authority (CA) that issues HTTPS certificates to websites is removed from a root store because it is no longer trusted to issue certificates. This means certificates issued by that CA will be treated as invalid, likely causing certificate error interstitials in any browser that…
A Ukrainian man indicted in 2012 for conspiring with a prolific hacking group to steal tens of millions of dollars from U.S. businesses was arrested in Italy and is now in custody in the United States, KrebsOnSecurity has learned.
Last year, I urged furries to stop using Telegram because it doesn’t actually provide them with any of the privacy guarantees they think it gives them. Instead of improving Telegram’s c…
WIRED's Andy Greenberg discusses a revelation that turned his decades-long reporting on its head: Bitcoin became a criminal's worst nightmare.
Matrix, the open protocol for secure decentralised communications
This article details two bugs discovered in the NVIDIA Linux Open GPU Kernel Modules and demonstrates how they can be exploited. The bugs can be triggered by an attacker controlling a local unprivileged process. Their security implications were confirmed via a proof of concept that achieves kernel read and write…
