Google plans to use a combination of system hardening, process isolation, verified boot, secure auto-update and encryption to thwart malicious hackers from planting malware on its new Google Chrome OS. The operating system borrows much of its security posture from the Chrome browser and, at first glance, resembles the security model used by Apple to secure its iPhone device. The end goal is to recover from a successful attack by simply applying an update and rebooting the infected machine. Google says users shouldn t worry about the privacy of their data if they forget their device in a coffee shop or share it with their family members.
Source: https://threatpost.com/inside-google-chrome-os-security-model-111909/73140/