Google is introducing a new defense for Android called ‘Developer Verification’ to block malware installations from sideloaded apps sourced from outside the official Google Play app store.

For apps on Google Play, there was already a requirement for publishers to provide a D-U-N-S (Data Universal Numbering System) number, introduced on August 31, 2023.

Google says this has had a notable effect in reducing malware on the platform. However, the system didn’t apply to the vast developer ecosystem outside the app store.