http://www.wsj.com/articles/google-takes-on-apple-facebook-with-allo-and-duo-chat-apps-1463599791 http://www.wsj.com/articles/google-takes-on-apple-facebook-w..

http://www.wsj.com/articles/google-takes-on-apple-facebook-with-allo-and-duo-chat-apps-1463599791 http://www.wsj.com/articles/google-takes-on-apple-facebook-w... (https://archive.is/ELitC https://archive.is/ELitC for paywall) >All chats will be encrypted, but a special incognito mode will have an end-to-end encryption, and expiring chats that are permanently deleted once you leave them.