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How not to prove your election outcome

Haines, Thomas Edmund; Lewis, Sarah Jamie; Teague, Vanessa
Peer reviewed, Journal article
Accepted version
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URI
https://hdl.handle.net/11250/2723423
Date
2020
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  • Institutt for matematiske fag [1434]
  • Publikasjoner fra CRIStin - NTNU [20948]
Original version
10.1109/SP40000.2020.00048
Abstract
The Scytl/SwissPost e-voting solution was intended to provide complete verifiability for Swiss government elections. We show failures in both individual verifiability and universal verifiability (as defined in Swiss Federal Ordinance 161.116), based on mistaken implementations of cryptographic components. These failures allow for the construction of "proofs" of an accurate election outcome that pass verification though the votes have been manipulated. Using sophisticated cryptographic protocols without a proper consideration of what properties they offer, and under which conditions, can introduce opportunities for undetectable fraud even though the system appears to allow verification of the outcome.Our findings are immediately relevant to systems in use in Switzerland and Australia, and probably also elsewhere.
Publisher
IEEE
Journal
IEEE Symposium on Security and Privacy: Proceedings

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