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Skeptics say blockchain voting won’t improve security. It’s “mostly hype,” says J. Alex Halderman, a University of Michigan computer science professor known for hacking into voting machines. He says there are still core security problems with mobile voting that blockchain doesn’t solve, such as preserving anonymity and transferring votes from smartphones infected with malware. It’s “worthy of research and study—but it may be decades until we get there,” Halderman says.

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