There is no question that technological systems are vulnerable to breaches. I'm not sure there will ever be a system that is free of that risk. I think, legally speaking, if digital services occur, it's important that there be a legal obligation for government to apply strong technological safeguards. Technologically, in Estonia, as you know, there are blockchains and encryption. These are state-of-the-art systems. Do they guarantee that there will not be breaches? No.
On January 31st, 2019. See this statement in context.