Open Source

Why Free, Libre and Open-Source Software is Essential for Internet Freedom

May 12, 2026

Free, libre and open-source software (FLOSS) is a core value of Guardian Project’s work, not a stylistic preference or a marketing line. …

ButterBox: Spring 2026 Update!

May 1, 2026

The ButterBox Project recently completed a four month intensive development sprint, supported by the Open Technology Fund, focused on improving …

Kindness Mode: Help People Connect to Tor on World Kindness Day

November 13, 2025

Today is World Kindness Day. As stated on Wikipedia, “World Kindness Day is to highlight good deeds in the community focusing on the positive …

7ASecurity Completes Security Audit of Círculo

March 17, 2025

Over the last six months, we’ve been working with 7ASecurity through support from the Open Technology Fund’s Security Safety Audits, to complete an …

A Look Back at 2024: F-Droid's Progress and What’s Coming in 2025

January 21, 2025

With 2024 now behind us, we wanted to take a moment to reflect on the growth and achievements we accomplished as a community last year, and celebrate …

Using TLS ECH from Python

January 10, 2025

At first, the idea of encrypting more of the metadata found inside the initial packet (the “ClientHello”) of a TLS connection may seem …

The future of our fdroid-compatible app repository

February 24, 2024

Guardian Project has been running its own fdroid-compatible app repository since 2012. Up until now, we worked to ensure that our repository had the …

Quick set up guide for Encrypted Client Hello (ECH)

November 10, 2023

The Encrypted Client Hello (ECH) mechanism draft-spec is a way to plug a few privacy-holes that remain in the Transport Layer Security (TLS) protocol …

DEfO - Developing ECH for OpenSSL (round two)

November 9, 2023

Encrypted ClientHello (ECH) plugs a privacy-hole in TLS, hiding previously visible details from network observers. The most important being the name …

F-Droid's Community-controlled Backup Ceremony

July 15, 2023

(Guest post from F-Droid, originally on f-droid.org) Seven core contributors and one board member met in Scotland, the birthplace of F-Droid, for the …