If you use the Chat Lock feature then you know that all the locked chats are tucked away within a dedicated Locked Chat ...

WhatsApp is introducing a new Secret Code feature for encrypted conversations ... with other users when transferring your phone to a friend or if it falls into the wrong hands.

In an announcement blog post, WhatsApp has introduced a Secret Code for Chat Lock that appears ... you choose to share your phone with your friends, family, or someone else, for that matter.