Are my messages secure?
WhatsApp messages are encrypted.
We do not store your chat history on our servers. Chat messages are considered private and are only stored until they are delivered.
Even though data sent through our app is encrypted, remember that if your phone or your friend's phone is being used by someone else, it may be possible for them to read your WhatsApp messages. Please be aware of who has physical access to your phone.
WhatsApp Support Team