whistleblowers Archives

AppWizard

July 13, 2025

Secure Messaging: The Guardian Leverages Millions of Readers to Provide Strong Plausible Deniability

The Guardian has introduced a tool called Secure Messaging to protect journalistic sources, utilizing an open-source technology named CoverDrop. This system allows whistleblowers to communicate securely and anonymously with journalists by concealing the fact that messaging is occurring. CoverDrop integrates a module within The Guardian's mobile app, an untrusted cloud-based API, on-premises services known as CoverNode, and a desktop application for journalists. The CoverNode functions as a mix node to ensure the anonymity of sources. The app exchanges encrypted messages that appear indistinguishable from regular app data, providing cover for users. The technology has been rolled out to millions of users this year, and a white paper detailing its design has been published. Currently, the platform does not allow sharing of photographs or documents, but future plans include linking uploaded files with conversations. The source code for CoverDrop is available on GitHub under the Apache License 2.0.

AppWizard

July 7, 2025

Jack Dorsey evokes Bitcoin ethos with new decentralised messaging app Bitchat

Jack Dorsey introduced a test version of a decentralized messaging application called Bitchat, designed for private conversations through end-to-end encryption. The app enables ephemeral, encrypted communication without relying on internet infrastructure, making it resilient to network outages and censorship. Bitchat operates using Bluetooth to facilitate communication within a range of approximately 300 meters and does not require users to provide phone numbers or email addresses. Instead, users create their own handles for identification. The app automatically detects nearby users, allowing them to connect through chatrooms. Bitchat is intended for use in scenarios lacking internet access, such as concerts, airplanes, or during disaster response efforts.