Google's Messages app is enhancing user security through on-device AI to combat spam and harmful links. Key upgrades include an advanced scam detection system that identifies fraudulent delivery notifications and job offer scams, diverting them to spam or issuing user warnings. The app will also feature smart alerts to warn users about potentially harmful links, currently being tested in select countries. Additionally, users can filter out messages from international senders not in their contacts, directing them to the spam folder. A new feature will automatically blur nudity in images, with warnings for users sharing explicit content; this will be enabled by default for users under 18. Google is also implementing a contact verification system using public keys to authenticate identities. These updates are aimed at enhancing the safety of messaging for over one billion users.