Encryption and digital signatures are the two primary mechanisms to deliver this layer of information security.
Digital Signatures: Unsung Heroes of Voting System Security

Smartmatic's blog about electronic voting

Encryption and digital signatures are the two primary mechanisms to deliver this layer of information security.

Bulgaria, a country that implemented electronic voting in 8 elections last year, saw the world’s largest increase in electoral integrity

Authors: Peter Neffenger and Paul DeGregorio Citizens demand to know that the votes they cast are the votes that are counted. But our election systems are under unprecedented threats and our collective faith in the system has been faltering.

The lack of competition in the United States has resulted in insufficient innovation in the elections industry which has dampened voter confidence in election systems.

Last October, Belgium conducted local and provincial elections. The first half of a two-part election season, which will be completed next May with Parliamentary (Regional and Federal parliaments) and European elections.

For years, many in the election technology ecosystem have been promoting the implementation of e-voting systems that produce voter-verified paper audit trails (VVPAT).