san francisco trump administration refusal publicly accuse russia others wave politically motivate hack attack create policy vacuum security experts fear encourage cyber warfare past three months hackers break official websites qatar help create regional crisis suspect north korean-backed hackers close british hospitals ransomware cyber attack researchers attribute russia delete data thousands computers ukraine yet neither unite state 29-member nato military alliance publicly blame national governments attack president donald trump also refuse accept conclusions u.s. intelligence agencies russia interfere 2016 u.s. elections use cyber warfare methods help new york businessman win white house currently embroil cyber crisis existential proportion moment probably want cyber go away least relate politics say kenneth geers security researcher recently live ukraine work nato think tank cyber defense unfortunate side effect international cyber security without call know perpetrators hack attack inevitable former officials say see dynamics deterrence say ex-white house cyber security officer jason healey columbia university government retreat underscore departure end july chris painter official responsible coordinate u.s. diplomacy cyber security replacement name future position state department flux trump cyber officials publicly highlight strategy focus less build global norms bilateral agreements trump kremlin say russia unite state discussions create cyber security group big black hat def con security conferences week las vegas u.s. government unusually light footprint past government speakers include head national security agency senior homeland security officials session feature u.s. law enforcement officials discuss purport theft russia hundreds millions yahoo account credentials pull last minute spokeswoman federal bureau investigation say presentation cancel yahoo expert slat talk deputy assistant director eric sporre reassign run tampa fbi office policy vacuum leave unite state also affect private security firm say grow cautious publicly attribute cyber attack nation-states draw fire trump administration trump suggest april interview security firm crowdstrike work investigate election hack democratic national committee might trustworthy tell control ukrainian cyber policy veterans particularly alarm lack u.s. nato response destructive attack dub notpetya june strike computers worldwide especially harmful ukraine arm conflict russia east country cyber security experts jim lewis center strategic international study government veteran advise former president barack obama believe russia carry attack russian defense ministry immediately respond request comment lewis others predict trump publicly accuse russia nato say appear work government agency somewhere ring alarm bell eloquent way think drop ball say retire cia officer daniel hoffman work russian issue fail enough embolden them u.s. tread water cyber policy destructive attack mount