Security is a big concern for many users and while most typically think of that as meaning you protect your PC from malware, there are also easy ways to protect your conversations as well. Skype is now testing out a new feature called Private Conversations that delivers end-to-end encryption to your chats.
The encrypted communication channel works for both audio and text messages and files as well but not video calls. Microsoft is using the Signal Protocol by Open Whisper Systems to secure the data and for now, you can only use this feature with contacts that are participating in the Skype Insider Preview.
If you do start a Private Conversation, the contents of those chats will be hidden from the chat list and notifications will be turned off as well.
Private Conversations are available now to Skype Insiders using Skype version 188.8.131.52 for iOS, Android, Linux, Mac, and Windows Desktop.