Featured Articles

Hardening Guide for phpList
Crowdfunding on Crowd Supply (Review of my experience)
WordPress Multisite on the Darknet (Mercator .onion alias)
Detecting (Malicious) Unicode in GitHub PRs
Nightmare on Lemmy Street (A Fediverse GDPR Horror Story)
Continuous Documentation: Hosting Read the Docs on GitHub Pages (2/2)
Trusted Boot (Anti-Evil-Maid, Heads, and PureBoot)
Introducing BusKill: A Kill Cord for your Laptop
WordPress Profiling with XHProf (Debugging & Optimizing Speed)
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Nightmare on Lemmy Street (A Fediverse GDPR Horror Story)

Nightmare on Lemmy "A Fediverse GDPR Horror Story"

This article will describe how lemmy instance admins can purge images from pict-rs (click here if you just want to know how).

This is (also) a horror story about accidentally uploading very sensitive data to Lemmy, and the (surprisingly) difficult task of deleting it.


tl;dr I (accidentally) uploaded a photo of my State-issued ID to Lemmy, and I couldn't delete it.

Friends don't let friends compose jerboa comments in bed before coffee (@theyshane)

A few weeks ago I woke up to my 06:00 AM alarm, snoozed my phone, rubbed my eyes, and started reading /c/worldnews (on Lemmy).

Still half-asleep, I was typing a comment when my thumb accidentally hit the "upload media" button. Up popped a gallery of images. I tried to click the back button, but I missed. I tapped on a photo. The photo that I tapped-on was a KYC selfie image (that I took the previous day for a service that has no business having such PII anyway).

That was all it took -- two consecutive mis-taps while half-asleep in bed, and my dumb-ass just inadvertently uploaded a KYC selfie onto the public internet. And thanks to archaic State authentication systems, anyone with
. . . → Read More: Nightmare on Lemmy Street (A Fediverse GDPR Horror Story)

Trusted Boot (Anti-Evil-Maid, Heads, and PureBoot)

Verifying Boot Integrity with Heads, PureBoot

This post will help to provide historical context and demystify what's under the hood of Heads, PureBoot, and other tools to provide Trusted Boot.

I will not be presenting anything new in this article; I merely hope to provide a historical timeline and a curated list of resources.


The Librem Key cryptographically verifies the system's integrity and flashes red if it's detected tampering

I've always felt bad about two things:

Because I run QubesOS, I usually disable "Secure Boot" on my laptop I travel a lot, and I don't have a good way to verify the integrity of my laptop (eg from an Evil Maid that gains physical access to my computer)

To address this, I have turned to Heads and PureBoot -- a collection of technologies including an open-source firmware/BIOS, TPM, and a USB security key that can cryptographically verify the integrity of the lowest firmware (and up the chain to the OS).

While Purism has written many articles about PureBoot and has some (minimal) documentation, I found they did a lot of hand waving without explaining how the technology works (what the hell is a "BIOS measurement"?). So I spent a great deal of
. . . → Read More: Trusted Boot (Anti-Evil-Maid, Heads, and PureBoot)

Detecting Censorship or ISP Network Tampering with OONI

This article will introduce a tool to detect censorship or network tampering using the Open Observatory of Network Interference (OONI) android app, which is part of the Tor Project.

The OONI project's mission is to collect data on network providers to determine where the Internet is free and where it's being manipulated. For example, the OONI Explorer displays a world map of such data.

On the OONI explorer, you can drill-down on the world map into a specific country to get a list of websites that were detected as being blocked from within that country.

For example, when I looked at the history of OONI probe runs within the US, I saw a list of the usual suspects: gambling sites, pornography sites, torrenting sites, etc. More surprising (at least to me) was the number of pastebin sites that were banned. And, despicably, there was a network in the US blocking The Internet Archive

When I looked at the data from scans within another great "free country" = India, I saw a lot of cherry-picked censorship on facebook and news articles as it relates to the 2017 genocide of Rohingya Refugees in Burma and various muslim/hindu conflicts.

. . . → Read More: Detecting Censorship or ISP Network Tampering with OONI