We have been recommending the Google Chromebook to our clients for use as a dedicated online banking system. The reason we like this platform even more than a Linux LiveCD boot disk is that because the Chrome operating system simply supports the operation of the notebook itself, and the Chrome browser. That’s it. There is not a way to install any programs to a Chromebook. All applications have to be cloud based (like Office 365), and accessed through the browser. This means that there should be no way to install malware to a Chromebook either.
Last year Google offered a $50,000 prize to anyone who could demonstrate a Chromebook breach, and the money went unclaimed. This year the bounty is $100,000.
Researching this a bit on the web, it does appear that there is a hack that would allow a Chromebook owner to install Android phone apps on a Chromebook. Presumably, because these come from the Google Store, there should be a low risk, but this does seems to offer some sort of portal onto these systems.
Nonetheless, we are still standing by our recommendation: If you bank online, use a Chromebook dedicated to that purpose. Never, ever read email on your banking system. And do not try out the Android App hacks, either. If you use a little operational security and self-discipline, you should be able to avoid losing your bank balance to cyber-criminals running banking Trojan exploits.