A new technology with sensors is under development that could replace passwords with a wave of the hand to verify a person's identity.
Intel is developing a biometric sensor that could be installed in a laptop or tablet computer to scan the unique pattern of veins in a person's palm.
The plan to build the new technology was unveiled by Sridhar Iyengar, Director of Research at Intel Labs during Intel Developer Forum in San Francisco last week.
The technology is still under development, but would require new biometric sensors to be built into computers.
An accelerometer could be used to monitor when someone put the gadget down and automatically lock it to prevent unauthorised access, the paper said.
According to the paper, Iyengar said that the palm scanning technology worked much better than the finger-print scanners when tested on some laptops.