Google is offering a $2.7 million prize for those who manage to hack its Chrome OS operating system.
The web giant is holding its fourth Pwnium competition at a Canadian security conference in March, where the prize money will be up for grabs.
The largest monetary prizes will be handed to computer experts who manage to hack into a HP or Acer Chromebook, and remain in control of the machine after a reboot.
There will be smaller $110,000 and $150,000 sums on offer for the individuals and teams who successfully compromise the Chrome OS.
A hacker known as Pinkie Pie claimed the biggest win at last year’s event, taking home $40,000 for pulling off a partial exploit.
This year’s contestants may use Intel or ARM powered laptops for the first time since the event was launched.