The specific vulnerability that we exploited is simple to fix, but it will be vastly more difficult to make the system secure. We’ve found a number of other problems in the system, and everything we’ve seen suggests that the design is brittle: one small mistake can completely compromise its security. I described above how a small error in file-extension handling left the system open to exploitation. If this particular problem had not existed, I’m confident that we would have found another way to attack the system.
None of this will come as a surprise to Internet security experts, who are familiar with the many kinds of attacks that major web sites suffer from on a daily basis. It may someday be possible to build a secure method for submitting ballots over the Internet, but in the meantime, such systems should be presumed to be vulnerable based on the limitations of today’s security technology.
via Freedom to Tinker – Hacking the D.C. Internet Voting Pilot. Internet voting, yeah it’s a bad idea in theory and bad in practice.
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