![]() Sakura Samurai members Aubrey Cottle ( Robert Willis ( and Jackson Henry ( discovered an unencrypted directory, /Cache, associated with the Keybase client that contained a comprehensive record of images from encrypted chat sessions. Clearly there was some kind of software error – a collision of sorts – where the images were not getting cleared.”Įxploitable Flaw in NPM Private IP App Lurks Everywhere, Anywhereĭiscovering that flaw put Sakura Samurai researchers on the hunt for more and they soon struck pay dirt again. “In general, when you would copy and paste in a Keybase chat, the folder would appear in (the uploadtemps) folder and then immediately get deleted,” Jackson told Security Ledger in a phone interview. First: Jackson discovered that images that were copy and pasted into Keybase chats were not reliably deleted from a temporary folder, /uploadtemps, associated with the client application. Deleted…but not goneĪccording to researcher John Jackson of Sakura Samurai, the Keybase flaw manifested itself in two ways. Zoom said it has fixed the flaw in the latest versions of its software for Windows, macOS and Linux. The flaw was discovered by researchers from the group Sakura Samurai as part of a bug bounty program offered by Zoom, which acquired Keybase in May, 2020. However, it could put their security, privacy and safety at risk, especially for users living under authoritarian regimes in which apps like Keybase and Signal are increasingly relied on as a way to conduct conversations out of earshot of law enforcement or security services. The flaw in the encrypted messaging application ( CVE-2021-23827) does not expose Keybase users to remote compromise. This in-depth guide explains how to set up and use Mailvelope.A serious flaw in Zoom’s Keybase secure chat application left copies of images contained in secure communications on Keybase users’ computers after they were supposedly deleted. Mailvelope offers PGP email encryption and decryption through a friendly web browser add-on, enabling Mailvelope users to message using some popular email clients, including GMail and Microsoft Outlook. This guide walks through how to get started. ProtonMail is an email client designed to make PGP easier to work with, particularly when sending encrypted messages with other ProtonMail users. However, it is infamously tricky to use, and even experienced users make mistakes. Since the 90s, Pretty Good Privacy (PGP) has been the standard for encrypting messages and files, including over email. ![]() This guide describes how to set up and use Keybase, as well as some tips on using it safely. Keybase is a powerful, yet fairly simple end-to-end encrypted file sharing and chat service. This guide describes how to enable stronger security settings within WhatsApp, and how to minimize risk when using it. The good news: WhatsApp offers end-to-end encryption! The bad news: Its parent company, Facebook, collects a great deal of metadata about users and their contacts, and many of its most useful security features are not enabled by default. With over two billion users, WhatsApp is one of the most popular chat services in the world. This guide walks through how to use Signal to take ephemeral and private photos within the app, so they are never saved to the camera roll unless you choose. This may not preserve your privacy, for example, if you have automatic backups enabled on Google Drive or iCloud. This guide walks through several advanced settings Signal users can leverage to harden the app even further, as well as considerations for minimizing risk.Įveryone’s taken private photos at one time or another, but your phone may back up or store photos to your camera roll. This brief guide walks through setting up and using Signal for Android and iOS, and some additional caveats on how to use it most safely. Signal also differentiates itself by minimizing the amount of information it stores about conversations, such as who spoke to whom and when. Signal is one of the best end-to-end encrypted messengers out there, enabling voice, video, and messaging with other Signal users. Read our guides on some encrypted chat tools to get started. No uninvited guests - not even the service provider - should be able to listen in. For added privacy and security, we always recommend using chat tools that are end-to-end encrypted, meaning only the participants in conversation can discern the calls and messages. Yet, whether through ordinary phone calls or messages on Instagram, we often use chat tools that enable the service provider to eavesdrop on our conversations. We’d probably object if someone put a microphone and camera in our room, and could listen to our conversations at any time.
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