Several startup companies have recently begun to promote Internet voting systems, but with a new twist – using a blockchain as the container for voted ballots transmitted over the Internet from the voter’s private device. Blockchains are a relatively new system category a little akin to a distributed database. Proponents of blockchain voting promote it as a revolutionary innovation providing strong security guarantees that enable truly secure online elections. Unfortunately, these claims are false. Blockchains do not offer any real election security at all.
Internet voting has been studied by computer security researchers for over twenty years. Cyber security experts universally agree that no technology, including blockchains, can adequately secure an online public election. Elections have unique security and privacy requirements fundamentally different from and much more stringent than those in other applications, such as e-commerce. They are uniquely vulnerable because anyone on Earth can attack them, and a successful cyberattack might go completely undetected, resulting in the wrong people elected with no evidence that anything was amiss.