Google will apply encryption to users' data by default in the next version of its mobile operating system, Android L. Android has been offering offered encryption for three years now but many users did not make use of the feature. Keys are not stored off of the device, so they cannot be shared with law enforcement.

Android L, which is still in a developer preview mode, is due for release before the end of the year.

On Thursday, Apple also said that devices running its new iOS8 software would be encrypted by default, with even the company itself unable to gain access.

Both Apple and Google follow in the footsteps of Blackberry, which has encrypted data by default for some time.

The firms' focus on privacy comes after nude photos of celebrities were leaked online earlier this month.