xB Machine is a discontinued virtual operating system that is small enough to fit on a USB drive.
It brought a secure computing environment that anonymized all internet activity, and had portable encrypted file storage.
Virtualization, along with the native implementation of a Tor onion routing for internet connectivity and other encryption and privacy tools, had been utilized to increase the security and anonymity of the user.
The developers claimed that it is the most secure operating system in the world[2] and that the technology involved is highly resistant to hacking and spying, even in the most hostile environments.
The software also had a self-destruct sequence[4] for eliminating any traces that a user may have left behind on the drivespace after using xB Machine.