The US military is funding a project to develop electronics that can self-destruct like the secret messages in the Mission Impossible.
Darpa, the US Defense Advanced Research Projects Agency, has awarded computing giant IBM a $3.5m (£2.1m) contract to work on its Vanishing Programmable Resources (VAPR) project.
It is looking to develop a class of "transient" electronics that can be destroyed by remote control.
The kit could be used in combat zones.
IBM's proposal involves the use of a radio frequency trigger that could shatter a glass coating on a silicon chip and turn it into powder.