WhatsApp on Thursday started rolling out end-to-end encryption for backups stored on Google Drive and iCloud. The rollout has started months after the Facebook-owned company tested the update internally. Last month, WhatsApp announced that it would start rolling out end-to-end encrypted cloud backups for Android and iOS users. The opt-in feature will help users protect their backups from being accessed by third parties including cloud storage providers such as Google and Apple. It is also claimed to protect chat history stored in backups from WhatsApp.