How a Hacker Can Break Into Your Laptop With Just an iPhone
http://www.vocativ.com/12-2013/hacker-can-break-laptop-just-iphone/
“Many computers emit a high-pitched noise during operation, due to vibration in some of their electronic components,” write Adi Shamir, Eran Tromer and Daniel Genkin in their report, RSA Key Extraction via
Low-Bandwidth Acoustic Cryptanalysis. “These acoustic emanations are more than a nuisance: They can
convey information about the software running on the computer, and in particular leak sensitive information
about security-related computations.”
