Thermal (and Hybrid Thermal/Audio) Side-Channel Attacks on Keyboard Input. (arXiv:2210.02234v1 [cs.CR])

To date, there has been no systematic investigation of thermal profiles of
keyboards, and thus no efforts have been made to secure them. This serves as
our main motivation for constructing a means for password harvesting from
keyboard thermal emanations. Specifically, we introduce Thermanator: a new
post-factum insider attack based on heat transfer caused by a user typing a
password on a typical external (plastic) keyboard.

We conduct and describe a user study that collected thermal residues from 30
users …

attacks audio channel hybrid input keyboard side-channel side-channel attacks thermal