End-to-end encryption of those messages and their storage would have prevented Meta from complying with the search warrant.

Meta has had Thursday’s announcement planned for months, the spokesperson said.

The company previously announced steps toward default end-to-end encryption inAugust 2021andJanuary 2022.

Secure storage tests will begin this week, though only on Android and iOS devices.

Other ways of accessing Messenger, like on desktop, aren’t included in the test.