University of Michigan researchers say they've found a way to circumvent RSA authentication.

"The researchers found that by varying the voltage on a device it was possible to get their hands on the 'private key' needed to beat the security feature," writes eWeek's Brian Prince. "Using what they described as an inexpensive device specially-built for the experiment, the trio manipulated the voltage and caused the computer to make small mistakes in its communications with other clients."

"This ultimately revealed small pieces of the private key, which they eventually used to reconstruct the key offline," Prince writes.

Click here to read the eWeek article.