Election protocols embodying robustness, verifiability of returns by voters, and unconditional security for voters’ privacy have been presented. The techniques also allow untraceable payments and credentials.

Advances in Cryptology - EUROCRYPT
Centrum Wiskunde & Informatica, Amsterdam (CWI), The Netherlands

Chaum, D. (1988). Elections with unconditionally-secret ballots and disruption equivalent to breaking RSA. In Lecture Notes in Computer Science/Lecture Notes in Artificial Intelligence (pp. 177–182). doi:10.1007/3-540-45961-8_15