Scientists at Lancaster University, who patented the new method, were inspired by how the heart and lungs coordinate their rhythms by passing information between each other.
A mathematical model based on the complex interaction between these organs has now been transferred to the world of modern communications, researchers said.
This discovery could transform daily life which is reliant on secure electronic communications for everything from mobiles to sensor networks and the internet, they said.
Every device, from car keys to online bank account, contains different identification codes enabling information to be transferred in confidence.
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The new method is exceptionally resistant to interference from the random fluctuations or "noise" which affects all communications systems.
It can also transmit several different information streams simultaneously, enabling all the digital devices in the home, for example, to operate on one encryption key instead of dozens of different ones.
"This promises an encryption scheme that is so nearly unbreakable that it will be equally unwelcome to internet criminals and official eavesdroppers," said researcher Professor Peter McClintock.