Personally I'm not convinced that an attack against an electronic ledger can scale in all cases. If the model of an electronic vote relies on individual keys h

Personally I'm not convinced that an attack against an electronic ledger can scale in all cases. If the model of an electronic vote relies on individual keys having cast votes (following something like a vote enrollment), the attacker will have to spoof all those keys for the result to look authentic and at the same time be malicious. Depending on how those "keys" have been generated in the enrollment, this could be difficult to scale. The most basic premise would be that the "tallier" and the voter create this key together, and once committed to the ledger can't be tampered with by any of them. A vote must be signed with this key. The voter can override their vote at any time while the election runs. (This is something that I'm paraphrasing from the article actually) This does not scale as it requires a malicious actor to hijack enrollment and voting for a large number of voters. If enrollment is being done based on a physical device (eg, electronic ID card) it's even less so.