Evaluating mail-based security for electoral processes using attack trees.

Since the reports of Russian interference in the 2016 United States General Election, the security of voting processes has received increased attention from both state and federal authorities. The declaration by the US Department of Homeland Security in January 2017 that election systems be classified as the 17th component of critical infrastructure is just the beginning of a need for more secure voting processes. More recently, the COVID-19 pandemic and the 2020 US General Election have placed greater emphasis specifically on mail-based voting processes for electoral systems.