Researchers Find Way to Recover Cryptographic Keys by Analyzing LED Flickers

In what’s an ingenious side-channel attack, a group of academics has found that it’s possible to recover secret keys from a device by analyzing video footage of its power LED.
“Cryptographic computations performed by the CPU change the power consumption of the device which affects the brightness of the device’s power LED,” researchers from the Ben-Gurion University of the Negev and Cornell