The Head of the Ukrainian Central Election Commission Tetyana Slipachuk speaks during an interview with AFP in Kiev on February 27, 2019. - At the headquarters of Ukraine's SBU security service more than a dozen local and Western security experts watch a simulated foreign cyber attack on several big screens ahead of this month's presidential vote. During the joint EU-Ukraine cyber security drills the Westerners pretend to be hackers attacking the country's central election commission, while the Ukrainians seek to neutralise them. The exercises held in Kiev last week involved around a hundred experts and were part of efforts to prevent arch-foe Russia from interfering in the crucial March 31 election. (Photo by Genya SAVILOV / AFP)

The Head of the Ukrainian Central Election Commission Tetyana Slipachuk speaks during an interview with AFP in Kiev on February 27, 2019. - At the headquarters of Ukraine's SBU security service more than a dozen local and Western security experts watch a simulated foreign cyber attack on several big screens ahead of this month's presidential vote. During the joint EU-Ukraine cyber security drills the Westerners pretend to be hackers attacking the country's central election commission, while the Ukrainians seek to neutralise them. The exercises held in Kiev last week involved around a hundred experts and were part of efforts to prevent arch-foe Russia from interfering in the crucial March 31 election. (Photo by Genya SAVILOV / AFP)

The Head of the Ukrainian Central Election Commission Tetyana Slipachuk speaks during an interview with AFP in Kiev on February 27, 2019. - At the headquarters of Ukraine's SBU security service more than a dozen local and Western security experts watch a simulated foreign cyber attack on several big screens ahead of this month's presidential vote. During the joint EU-Ukraine cyber security drills the Westerners pretend to be hackers attacking the country's central election commission, while the Ukrainians seek to neutralise them. The exercises held in Kiev last week involved around a hundred experts and were part of efforts to prevent arch-foe Russia from interfering in the crucial March 31 election. (Photo by Genya SAVILOV / AFP)