Apple’s latest software update, iOS 18, is enhancing iPhone security with stronger anti-theft features designed to protect user data if the device is stolen. These measures aim to make it harder for thieves to access private information and make the iPhone a more secure device overall. Two significant security changes include the “inactivity reboot” feature and an improved Stolen Device Protection option. This was first reported by 404 media.
Jiska Classen, a researcher at the Hasso Plattner Institute, posted a video of the iOS 18 inactivity reboot feature. The video shows that with iOS 18, Apple introduces an automatic “inactivity reboot” function that activates if the device is left unlocked for three consecutive days. This feature forces the iPhone to restart and enter a secure state called “Before First Unlock.”
In this state, the iPhone’s encryption keys, which protect user data, are locked within the Secure Enclave Processor. This makes it nearly impossible for thieves to access data with basic forensic tools, even if the iPhone remains powered on. As a result, the inactivity reboot aims to keep sensitive data safe by blocking unauthorised access attempts that rely on keeping the device running.
While this reboot feature provides a significant security boost, it may also present challenges for law enforcement when attempting to extract data from the devices of criminals. However, the three-day limit is generally enough time for investigators to coordinate efforts with forensic analysts for data retrieval, so it does not completely prevent lawful data access.
Another feature receiving attention is the Stolen Device Protection option, which is now more prominently placed during the iOS 18.2 setup process. Previously hidden within the settings menu, this feature is now presented to users as part of the initial setup, encouraging them to enable it for added security. When activated, Stolen Device Protection requires more frequent biometric authentication (such as Face ID or Touch ID) in addition to the device PIN, making it harder for thieves to gain access to the device and any linked accounts.
With these updates, Apple is reinforcing its commitment to user privacy and device security. The new anti-theft measures add layers of protection that make unauthorised access more challenging, aiming to give users peace of mind if their device is ever stolen. These features reflect Apple’s focus on security innovation, as the company continues to respond to the evolving landscape of digital threats. iOS 18’s enhanced security updates are now available, allowing users to take advantage of these protections by ensuring their devices are updated to the latest software.
