A research paper presented at the Usenix security conference last week detailed a new technique for retrieving encryption keys from electronic devices, a method that is much faster than all previously known techniques.
The approach relies on recording electromagnetic (EM) emanations coming off a device as it performs an encryption or decryption operation.
The attack relies on observing a short window of EM waves that have emanated from a device during a single decryption operation.
GSU researchers say their devised attack can recover between 95.7% and 99.6% of the RSA encryption key. They say the attack takes under one second to execute, and they were able to recover the full encryption key using a custom reconstruction algorithm.