| 摘要 |
An apparatus for generating ballot data, the apparatus comprising first key generating means configured to generate a random first public key for each of a plurality of ballots, each first public key comprising a base raised to the power of a respective first exponent; second key generating means configured to generate a second public key for each of the plurality of ballots using the generated first public keys, each second public key comprising said base raised to the power of a respective second exponent, wherein the sum of the products of the first and second exponents of the first and second public keys of respective ballots is zero; encoding means configured to encode data representing voter selection options for each of the plurality of ballots as cryptograms, each cryptogram comprising: said base raised to the power of the product of the first and second exponents of the corresponding first and second public keys, said base raised to the power of a third exponent that varies in accordance with said voter selection options, and verification data to demonstrate that said third exponent corresponds to one of the voter selection options; and output means configured to output the first and second public keys and the cryptograms of the plurality of ballots, for use by one or more electronic voting terminals. |
