Electronic voting method for e.g. polling station, involves verifying content of virtual ballot box by detecting abnormality if comparison indicates that register contains value different from stored ballot multiplication result

摘要

The method involves initializing a register to a neutral value. Each encrypted ballot arriving on a server is multiplied with the register value, and the value is replaced by a multiplication result such that the value is equal to product of all encrypted voting ballots arrived on the server. Content of a virtual ballot box is verified by multiplying encrypted ballots stored in the box, comparing the multiplication of stored ballots with the value, and detecting abnormality if the comparison indicates that the register contains a value different from the stored ballot multiplication result. The ballots are encrypted by a variant of Elgamal encryption algorithm. Independent claims are also included for the following: (1) an electronic voting server (2) a computer program product comprising instructions to perform an electronic voting method.