WhatsApp security improves radically with the addition of encrypted messages that will finally get security within the instant messaging service that is quite complete. A security that comes with an end to end encryption and comes by default to all messages.
The system that encrypt messages from now on will be as simple as possible. Each application users will have a key that encrypts and decrypts each message we send. Service which will be exchanging these keys between communicating users. Thus the service stops access to messages from users who are the only ones who will have those keys.
WhatsApp has been associated with people of Whisper Systems Open to get that security with the use of open source by creating new features that implementation. A free code that will be supported by Jan Koum, one of the founders of the company. He said on his Facebook account that has donated a lot of money to continue with this development.
Anyway, good news for all users from now may feel safer using the most popular instant messaging service worldwide.