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An upcoming Android security enhancement may soon provide users with a critical new layer of defense against data theft and USB-based attacks. According to findings in the source code of Android 16 Beta 4, Google is preparing to roll out a feature that disables USB data access when a phone is locked, effectively turning the USB port into a charge-only connection, according to Android Authority.
This security measure, if implemented, will prevent malicious actors from exploiting the USB port to install malware or extract sensitive data. While USB-based attacks may seem rare, real-world examples highlight the very real threat posed by such vectors.
By defaulting to a charge-only mode while the device is locked, Android would significantly reduce the risk of unauthorized access via physical ports. The underlying technology enabling this functionality involves a new API that disables USB data signaling. While it has so far been restricted to enterprise environments, Google may expand its availability to all users with the public release of Android 16.
The USB restriction is expected to be part of Android’s broader Advanced Protection Mode (APM), a feature designed to offer users stronger device safeguards. APM already includes capabilities like blocking 2G network connections—often used in surveillance attacks—and preventing installations from unknown sources outside the Google Play Store. It also disables outdated WEP-encrypted Wi-Fi connections, which are highly vulnerable to interception.
In a related security move, Google recently introduced a lock-based auto-reboot mechanism. Android devices now automatically restart if left locked for more than 72 hours, making persistent attacks more difficult.
The USB data blocking feature reinforces Android’s growing emphasis on proactive, built-in protection, particularly in light of evolving threats against mobile devices. As smartphones become more critical in both personal and professional contexts, securing their physical and digital interfaces is increasingly essential. Android 16’s forthcoming tools reflect that shift toward deeper, more automated security at the operating system level.
