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Homomorphic encryption is form of encryption which allows mathematical operations to be carried out on an encrypted message, using only the ciphertext. Cryptography.SE may be more suitable for some questions on this topic.

2 votes

Why cant all voters be authorities in homomorphic encryption based voting scemes?

To prevent coercion and vote-selling. If the voter has the ability to itself reveal the vote to a outsider, he could be coerced or sell his vote. Thats why you need a trusted authority, that all vote …
sebastian nielsen's user avatar