"The most common digital security technique used to
protect both media copyright and Internet communications has a
major weakness, University of Michigan computer scientists have
"RSA authentication is a popular encryption method used in media
players, laptop computers, smartphones, servers and other devices.
Retailers and banks also depend on it to ensure the safety of their
customers' information online.
"The scientists found they could foil the security system by
varying the voltage supply to the holder of the "private key,"
which would be the consumer's device in the case of copy protection
and the retailer or bank in the case of Internet