Qubes OS : An Operating System Designed For Security
Qubes is an open source operating system designed to provide strong security for desktop computing. Qubes is based on Xen, X Window System, and Linux, and can run most Linux applications and utilize most of the Linux drivers. In the future it might also run Windows apps.
Key architecture features:

  • Based on a secure bare-metal hypervisor (Xen)
  • Networking code sand-boxed in an unprivileged VM (using IOMMU/VT-d)
  • No networking code in the privileged domain (dom0)
  • All user applications run in “AppVMs”, lightweight VMs based on Linux
  • Centralized updates of all AppVMs based on the same template
  • Qubes GUI virtualization presents applications like if they were running locally
  • Qubes GUI provides isolation between apps sharing the same desktop
  • Storage drivers and backends sand-boxed in an unprivileged virtual machine(*)
  • Secure system boot based on Intel TXT(*)

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