There is no WhatsApp 'backdoor'
Today, the Guardian published a story falsely claiming that WhatsApp’s end to end encryption contains a “backdoor.”
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Video calls for Signal now in public beta
Today’s Signal release for Android and iOS includes beta support for video calls.This represents an entirely new calling infrastructure for Signal, and should increase voice call quality as well. We...
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Video calls for Signal out of beta
We recently released encrypted video calling as an opt-in beta. We’ve spent the past month collecting feedback and addressing the issues that the Signal community found in order to get it production...
View ArticleSafety number updates
The latest Signal beta includes some changes to the way safety numbers work. Back in November, we introduced experimental support for “advisory” safety number changes, with the objective of collecting...
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Encrypted profiles for Signal now in public beta
The latest Signal beta for Android and iOS introduces support for Signal Profiles.Profiles allow you to add a picture and display name that will be shown alongside your existing phone number when...
View ArticleTechnology preview: Private contact discovery for Signal
At Signal, we’ve been thinking about the difficulty of private contact discovery for a long time. We’ve been working on strategies to improve our current design, and today we’ve published a new private...
View ArticleRead receipts are coming to Signal
Today’s beta release of Signal for Android and iOS includes support for read receipts. This is an optional new feature that gives you the ability to see and share when messages have been read....
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Standalone Signal Desktop
Signal Desktop is now available in a new, standalone form, and the Chrome App has been deprecated.
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Expanding Signal GIF search
Today’s Signal beta for iOS includes support for animated GIF search. Signal iOS has long supported sending and receiving GIFs, but today’s beta adds support for browsing and searching popular GIFs...
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Signal partners with Microsoft to bring end-to-end encryption to Skype
In collaboration with Signal, Microsoft is introducing a Private Conversations feature in Skype, powered by Signal Protocol.
View ArticleSignal Foundation
Long before we knew that it would be called Signal, we knew what we wanted it to be. Instead of teaching the rest of the world cryptography, we wanted to see if we could develop cryptography that...
View ArticleAmazon threatens to suspend Signal's AWS account over censorship circumvention
Last week, we received the following email from Amazon: From: [redacted], [redacted] <[redacted]@amazon.com> Subject: Notification of potential account suspension regarding AWS Service Terms...
View ArticleA New Home
Whisper Systems was a company focused on the development of mobile security software, which was acquired by Twitter in late 2011. Twitter very generously made some of the Whisper Systems software...
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Spring Break Of Code
This Spring will be the first Open Whisper Systems Spring Break Of Code, a week-long, expenses-paid retreat to Maui for folks who like software development, security, and the beach. We’ve rented a...
View ArticleCreating a low-latency calling network
RedPhone is our mobile app for end-to-end encrypted voice calls. When we talk about RedPhone, we tend to emphasize the cryptography, and how using it can help keep your communications safe. What we...
View ArticleClient-side call quality
In our previous post, we discussed the global infrastructure that allows RedPhone clients to find low-latency servers when establishing a call. This post discusses the techniques we use to retain call...
View ArticleSBoC Lineup
We were excited about our Spring Break Of Code announcement, but the response was better than we anticipated: over 100 extremely impressive proposals from folks around the world who are passionate...
View ArticleMerchandise
It’s a busy time here at the Open Whisper Systems factory, and we need all the floor space we can get. We still have some first-edition T-Shirts that are taking up some space, so we’re offering them to...
View ArticleDirigibles, Chinese Junk Rigs, and Surfboards
Spring Break Of Code, Day One.One of the first times I met up with Moxie while travelling, we met at a dive bar in San Francisco’s Mission District, packed with hipsters. I had nineteen years, a...
View ArticleHighly Unconventional Suggested First Aid
Spring Break Of Code, Day Two“I am torn on how best to introduce myself out of context like this, the idea of rattling off facts from my resume is my first instinct, but that seems terribly...
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