0 % ▁of ▁employ ers ▁reported ▁using ▁social ▁networking ▁sites ▁to ▁collect ▁personal ▁data ▁on ▁pros pective ▁or ▁current ▁employees . ▁ ▁Bi ometric ▁ ▁Bi ometric ▁surve ill ance ▁is ▁a ▁technology ▁that ▁measures ▁and ▁analy zes ▁human ▁physical ▁and / or ▁behavior al ▁characteristics ▁for ▁authentication , ▁identification , ▁or ▁screen ing ▁purposes . ▁Ex amples ▁of ▁physical ▁characteristics ▁include ▁finger print s , ▁DNA , ▁and ▁fa cial ▁patterns . ▁Ex amples ▁of ▁mostly ▁behavior al ▁characteristics ▁include ▁g ait ▁( a ▁person ' s ▁manner ▁of ▁walking ) ▁or ▁voice . ▁ ▁Fa cial ▁recognition ▁is ▁the ▁use ▁of ▁the ▁unique ▁configuration ▁of ▁a ▁person ' s ▁fa cial ▁features ▁to ▁accur ately ▁identify ▁them , ▁usually ▁from ▁surve ill ance ▁video . ▁Both ▁the ▁Department ▁of ▁Hom eland ▁Security ▁and ▁D AR PA ▁are ▁heavily ▁fund ing ▁research ▁into ▁fa cial ▁recognition ▁systems . ▁The ▁Information ▁Process ing ▁Technology ▁Office ▁ran ▁a ▁program ▁known ▁as ▁Human ▁Ident ification ▁at ▁a ▁Dist ance ▁which ▁developed ▁techn ologies ▁that ▁are ▁capable ▁of ▁ident ifying ▁a ▁person ▁at ▁up ▁to ▁ ▁by ▁their ▁fa cial ▁features . ▁ ▁Another ▁form ▁of ▁behavior al ▁bi omet rics , ▁based ▁on ▁affect ive ▁computing , ▁involves ▁computers ▁recogn izing ▁a ▁person ' s ▁emot ional ▁state ▁based ▁on ▁an ▁analysis ▁of ▁their ▁fa cial ▁expressions , ▁how ▁fast ▁they ▁are ▁talking , ▁the ▁tone ▁and ▁pitch ▁of ▁their ▁voice , ▁their ▁post ure , ▁and ▁other ▁behavior al ▁tra its . ▁This ▁might