washington president donald trump sign law tuesday legislation ban use kaspersky lab within u.s. government cap months-long effort purge moscow-based antivirus firm federal agencies amid concern vulnerable kremlin influence ban include part broad defense policy spend bill trump sign reinforce directive issue trump administration september civilian agencies remove kaspersky lab software within 90 days law apply civilian military network case kaspersky well-documented deeply concern law long overdue say democratic senator jeanne shaheen lead call congress scrub software government computers add company software represent grave risk u.s. national security kaspersky lab repeatedly deny tie government say would help government cyber espionage attempt address suspicions company say october would submit source code software future update inspection independent party u.s. officials say step welcome would sufficient statement tuesday kaspersky lab say continue serious concern law due geographic-specific approach cybersecurity add company assess options would continue protect customers cyber threats collaborate globally security community fight cybercrime tuesday christopher krebs senior cyber security official department homeland security tell reporters nearly government agencies fully remove kaspersky products network compliance september order kaspersky official response ban appear contain information would change administration assessment kaspersky lab krebs say trump sign law u.s. government ban kaspersky lab software