Facebook-owned WhatsApp achieved a significant milestone, officially crossing the two billion user threshold.

WhatsApp is the most popular messaging app on the planet and is a primary means of electronic communication in many countries. In addition to being cross-platform, the app supports audio and video calls, text and voice messages, file sharing and more. Significantly, the app supports end-to-end encryption, making it a vital element for many journalists and individuals who live under oppressive regimes.

Not surprisingly, Facebook’s announcement regarding its user base focused heavily on the privacy aspects of the app. After acknowledging that the more people use the app, the more important it is to keep it secure, Facebook touted its commitment to continuing its strong stance on security and encryption.

“That is why every private message sent using WhatsApp is secured with end-to-end encryption by default. Strong encryption acts like an unbreakable digital lock that keeps the information you send over WhatsApp secure, helping protect you from hackers and criminals. Messages are only kept on your phone, and no one in between can read your messages or listen to your calls, not even us. Your private conversations stay between you.

“Strong encryption is a necessity in modern life. We will not compromise on security because that would make people less safe. For even more protection, we work with top security experts, employ industry leading technology to stop misuse as well as provide controls and ways to report issues — without sacrificing privacy.”

As the war on privacy continues, it’s reassuring that one of the most widely used services remains more committed than ever to supporting strong encryption in an effort to protect its users.