▁restart ed ▁in ▁March ▁ 2 0 1 3 . ▁ ▁In ▁ 2 0 1 3 , ▁the ▁first ▁T all inn ▁Man ual ▁on ▁the ▁International ▁Law ▁App lic able ▁to ▁Cy ber ▁War fare ▁was ▁published . ▁ ▁This ▁publication ▁was ▁the ▁result ▁of ▁an ▁independent ▁study ▁to ▁examine ▁and ▁review ▁laws ▁gover ning ▁cy ber ▁war fare ▁spons ored ▁by ▁the ▁NAT O ▁Cooper ative ▁Cy ber ▁Def ence ▁Centre ▁of ▁Ex cell ence ▁in ▁ 2 0 0 9 . ▁ ▁In ▁February ▁ 2 0 1 3 , ▁the ▁White ▁House ▁President ial ▁Executive ▁Order ▁( E . o .) ▁ 1 3 6 3 6 ▁" Im pro ving ▁Crit ical ▁In frastr ucture ▁Cy ber security " ▁was ▁published . ▁ ▁This ▁executive ▁order ▁highlight ed ▁the ▁policies ▁needed ▁to ▁improve ▁and ▁coordinate ▁cy ber security , ▁identification ▁of ▁critical ▁infrastr ucture , ▁reduction ▁of ▁cy ber ▁risk , ▁information ▁sharing ▁with ▁the ▁private ▁sector , ▁and ▁ensure ▁civil ▁and ▁priv acy ▁libert ies ▁prote ctions ▁are ▁incorpor ated . ▁ ▁In ▁January ▁ 2 0 1 4 , ▁the ▁White ▁House ▁President ial ▁Policy ▁Direct ive ▁ 2 8 ▁( PP D - 2 8 ) ▁on ▁" Sign als ▁Int elligence ▁Activ ities " ▁was ▁published . ▁ ▁This ▁president ial ▁policy ▁directive ▁highlight ed ▁the ▁principles , ▁limitations ▁of ▁use , ▁process ▁of ▁collection , ▁saf egu arding ▁of ▁personal ▁information , ▁and ▁trans par ency ▁related ▁to ▁the ▁collection ▁and ▁review