1. A ballot authentication system comprising: a ballot, on which election-choice-information is printed, the ballot including a plurality of first security features embedded in the ballot and a plurality of second security features printed on the ballot; and a voting unit that includes at least a ballot scanner that is configured to detect the plurality of first security features and the plurality of second security features during scanning of the ballot, wherein the voting unit is configured to authenticate the ballot by comparing the detected first and second security features embedded in and printed on the ballot with predetermined security features stored in the voting unit memory.