stevedcc writes "New Scientist are running an article about using sound waves to communicate between different devices attached to a user's body, avoiding the potential interception issues of wireless signals. From the article:
They want to use the human skeleton to transmit commands reliably and securely to wearable gadgets and medical implants. Their research, funded by Microsoft and Texas Instruments, could also lead to new ways for people with disabilities to control devices such as computers and PDAs.
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