There are matters of privacy, security, and I think Estonia also had a national identity card, which we don't have in Canada. Obviously, the integrity and auditability of the process are going to be key in anything we do.
I should maybe also mention that i-voting, the way we're looking at it right now, is meant to address a particular group of electors who are currently facing challenges in voting. We're thinking of the military who are based overseas; we're thinking of Canadians abroad, who depend on the postal vote, which, depending on the service.... In the last general election we received 3,000 mail ballots too late to be counted. We're also thinking about disabled electors, who have serious challenges if they're not mobile, who could take advantage of a service like that.