The Swiss Confederation is asking for the help of the Internet:
The Swiss Cantons have offered online voting to members of their electorate since 2004. Meanwhile, more than 200 binding trials at Federal votes and elections have taken place in 15 cantons. In order to expand online voting to a broader public, the Federal regulation obliges the Cantons to meet an additional set of requirements. These include the system feature of full verifiability, performing numerous audits and publishing the software components’ source code. Additionally, the Swiss Confederation and the Cantons have decided that the systems need to be publicly tested within the setting of a public intrusion test (PIT).
The online voting system currently subject to the PIT is provided by Swiss Post. It has already been pen-tested and certified under the legal framework of the Swiss Confederation. By performing the PIT, the Confederation and the Cantons are hoping to get a valuable outside view on the system by a large number of competent people.
The Public Intrusion Test will be running for a period of four weeks, which corresponds to the duration of a Swiss federal vote.
Feb. 25th – Mar. 24th 2019
In more details, voting is possible from Feb. 25th, 12:00 until Mar. 23rd, 12:00 (GMT+1). Findings can be submitted until Mar. 25th, 23:59 (GMT+1).
And as for payments (“bug bounties”):
Swiss Post have committed to compensate participants if they reveal a relevant vulnerability. An amount of CHF 150’000.- ($150,015 / ~116,000 GBP) is available for compensations.