The US Department of Homeland Security started an investigation into the attacks, according to a White House source.[1][16][17] No group of hackers has claimed responsibility.[18] Dyn's chief strategist said in an interview that the assaults on the company's servers were very complex and unlike everyday DDoS attacks.[19] Dr. Barbara Simons, a member of the advisory board of the US Election Assistance Commission, said such attacks could affect Internet voting for overseas military or civilians.[19]