WhatsApp is also being prepared. Apple's battle with the FBI is closely monitored by all smartphone communications companies, as there is concern about security breaches by each government. This is at least the optimistic scenario, as Snowden's revelations indicate that secret services are behind any internet communication. 
One of the companies affected by these issues in the past, WhatsApp is planning to provide end-to-end encryption for voice calls and group conversations.
According to a publication in the newspaper The Guardian, some official announcement from WhatsApp is expected very soon, with which the company will confirm the improvements security in its instant messaging service.
WhatsApp has already added encryption of messages to Android and iOS devices, but in the next few weeks will extend end-to-end voice and group conversations.
The same publication points out that WhatsApp's encryption will be based on the code developed by a famous evangelist protectionof privacy, Moxie Marlinspike.
This specific encryption code has been tested many times by external security experts, and seems to fit the needs of WhatsApp.
The founder of the company, Jan Koum, always said that users should expect security to be a given, not a bonus.
