One of the classic such attacks is van Eck phreaking, picking up EM emissions from CRTs. [1] I'm not sure if other techniques could be used for LCDs. There hav

One of the classic such attacks is van Eck phreaking, picking up EM emissions from CRTs. [1] I'm not sure if other techniques could be used for LCDs. There have been several papers published about keyboard acoustic sidechannels as well. [1]: http://en.wikipedia.org/wiki/Van_Eck_phreaking http://en.wikipedia.org/wiki/Van_Eck_phreaking