Using the engine from TextSecure or something, it seems that Whatsapp has finally planned the higher level of upgraded encryption process although this kind of higher security may mean that in addition to good people using it for privacy protection, there may be cyber-criminals using services like this as well without being detected. But that's not the important point at the present time because the bigger scumbags nowadays are probably the corrupted agencies that have been spying on innocent people like trying to detect the location for criminals that way. The spying is so illegal that those scumbags are pretty much the bigger cyber-criminals claiming things to be legal enough.
Of course, when it comes to safer alternatives like TextSecure or any other Silent Circle products, there may be some other problems. First thing is that not all people know what those alternative services are that they are sticking on to the popular services like Whatsapp which is kind of vulnerable in terms of security until the time Whatsapp has planned the upgraded encryption level which attracts even more users like us. The good reason for this opportunity is that the man behind Whatsapp had already despised the cyber-spying all along that he's come up with the good deeds for us, the good people, not those criminals.
At the time of blogging about this, the encryption is getting effective for Android users and that IOS and Windows Phone users will have to wait even more for the same security to arrive.