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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 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...
View ArticleStreamlining TextSecure Settings
Spring Break Of Code, Day ThreeI am no stranger to Hawaii. Although I’ve never lived here myself, I’ve visited the islands perhaps a dozen times. My grandmother and my father were born and raised here....
View ArticleSure!
Spring Break Of Code, Day FourThe main sound on top of the ocean is the click clack of laptop keys, and the jangle of test calls and SMSes. A neighbor stopped by to comment that we must be the next...
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All The Things That Pull And Push
Spring Break Of Code, Day FiveI know very well that each and every crisis of modernity is concentrating, concatenating, and seating more deeply into everyday life. I know the struggles of the world’s...
View ArticleCall Quality Metrics
Spring Break Of Code, Day SixBecause secure systems aren’t valuable if they’re not used, WhisperSystems has always focused on delivering strong cryptography alongside a great user experience. That’s...
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SBoC Farewell
The last code committed, the final waves surfed in to the shore, the closing sunset of Spring Break Of Code.
View ArticleInterested in privacy enhancing technology? How to get involved at Open...
Open Whisper Systems is a project focused on developing Open Source security and privacy apps for the mobile environment. With all of the recent discussion about PRISM,Boundless Informant, andFISA...
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Simplifying OTR deniability.
At Open Whisper Systems we help develop TextSecure, an encrypted chat application for Android. TextSecure was designed as a general purpose SMS/MMS client which would also automatically encrypt...
View ArticleForward Secrecy for Asynchronous Messages
Traditionally, asynchronous messaging systems such as email have relied on protocols like PGP or S/MIME for cryptographic security. These protocols work the way most people are familiar with: one who...
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