Submitted via IRC for takyon
Back in January, Skype announced it was testing end-to-end encrypted chat conversations, secured using Signal Protocol by Open Whisper Systems. Now, the feature is available for all users on Skype iOS, Android, Linux, Mac, and Windows Desktop.
Source: https://www.theverge.com/2018/8/20/17725226/skype-private-conversation-end-to-end-encrypted-opt-in [theverge.com]