That said, in my opinion, Clint Curtis is not a credible witness. What he claims is certainly plausible. But he doesn't have the technical chops to pull it off.
For something more reality-based, check out voteraction's lawsuit in New Mexico. http://voteraction.org/legalaction
VoterAction proved that Kerry won NM in 2004. What happened in NM certainly happened elsewhere. Especially Ohio, which had so much going on in so many directions, there's no way to summarize other than to say "death by a thousand cuts".
Briefly, in NM, spanish language touchscreens did not count votes cast for Kerry. Further, "faulty" storage devices (memory cards) were sent to back vendor HQ to be fixed, totally mooting the chain of custody, etc.
The whole election integrity thing is like a jumping down the rabbit hole. Things are so ridiculous, it's hard to believe. And when you try to explain to people what's happened, you're dismissed as a "sweaty paranoid kook" (that's a quote).
Speaking for myself, I used to think that I mail my ballot and it gets counted, what could be more simple? The more I learned, the more my confidence was shaken.
I could go on and on and on about this topic...
[1] Yes, I've studied the crypto proposals. They're included. Briefly, crypto schemes rely on a secure one-way hash to hide your ballot in the herd of ballots. Alas, US elections are administered per precincts (1-1000 voters) and typically have a dozen or more issues per ballots. Meaning combinatorially there's no way to hide an individual's ballot. Crypto works for simple ballots with thousands of voters.