WhatsApp said that claims that infiltrators can add themselves to an encrypted group chat without being noticed is incorrect.

Signal is testing out a new private contact discovery service that will let the app determine if a user has Signal contacts in their address book, but forbid its servers from accessing the users’ address book.

The Senate’s use of the end-to-end encrypted messaging app Signal is a good first step in protecting U.S. democratic institutions, but much more needs to be protected.

A chorus of security experts say allegations WhatsApp’s end-to-end messaging platform has a backdoor are wrong and explain why reports making the claim are false.

Claims of a security hole in WhatsApp’s messenger app were shot down by WhatsApp, which called the allegations false.

Open Whisper Systems announced that it has added the disappearing messages feature to the Signal encrypted messaging app.

Open Whisper Systems, the group behind Signal, was served with a subpoena earlier this year but was unable to produce most of the data it was asked for.

iPhone users can now use Signal’s secure messaging app between their iOS device and their Mac OS or Windows desktops.

Signal has fixed bugs in its Android messaging app that allow an attacker to corrupt an encrypted attachment and remotely crash the application.

Facebook today began a test program rolling out opt-in end-to-end encryption for its Messenger service called Secret Conversations. The end-to-end encryption is based on the Signal protocol developed by Open Whisper Systems, the same protocol that stands up the crypto in the Signal and WhatsApp messaging applications. The Facebook version of the encryption service is...