Label yourself
We all take on different roles in relation to our friends, neighbors, family members, and colleagues. Keep those different roles clear in your many Signal group chats by using group member labels,
Signal Blog
Signal Blog
A 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
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
Creating 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
Client-side call quality
In our previous post (/blog/low-latency-switching), we discussed the global infrastructure that allows RedPhone clients to find low-latency servers when establishing a call. This post discusses the
Dirigibles, Chinese Junk Rigs, and Surfboards
Spring Break Of Code, Day One. One of the first times I met up with Moxie (https://twitter.com/moxie) while travelling, we met at a dive bar in San Francisco’s Mission District, packed with
Highly 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
Streamlining TextSecure Settings
Spring Break Of Code, Day Three I 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
Sure!
Spring Break Of Code, Day Four The 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
SBoC Farewell
The last code committed, the final waves surfed in to the shore, the closing sunset of Spring Break Of Code. Read more...
Interested in privacy-enhancing technology? How to get involved at Open Whisper Systems.
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
Simplifying OTR deniability.
At Open Whisper Systems we help develop TextSecure (https://play.google.com/store/apps/details?id=org.thoughtcrime.securesms), an encrypted chat application for Android. TextSecure was designed as a
Forward 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
Open Whisper Systems Alpine Hackathon
From October 11th to October 13th, we’ll be hosting an informal Open Whisper Systems Alpine Hackathon for those in or around Zurich, Switzerland who would like to contribute to Open Whisper
Alpine Hackathon Reportback
My cell phone used to be a black and white Nokia until a couple of weeks ago when I decided to enter in the smartphone world. Now that there are more mobile devices connected to the internet than
Winter Break Of Code
At Open Whisper Systems, we’re focused on creating easy-to-use privacy-enhancing technology. Our projects are free, Open Source, and tend to be oriented around the mobile environment. We’ve
TextSecure, Now With 10 Million More Users
At Open Whisper Systems, we’re working to both advance the state of the art for secure communication and also reduce the friction required for ordinary people to make use of it. We want everyone
WBoC Lineup
After our wonderful experience with Spring Break Of Code (https://whispersystems.org/blog/sure), we were excited to try this again. Even with high expectations based on our experience in the Spring,
BitHub = Bitcoin + GitHub. An experiment in funding privacy OSS.
At Open Whisper Systems, we often get emails from people who’d like to donate money to the project. For an OSS project, particularly one that aspires to a collective sense of ownership, handling
The Difficulty Of Private Contact Discovery
Building a social network is not easy. Social networks have value proportional to their size, so participants aren’t motivated to join new social networks which aren’t already large. It’s a