Hackers from around the world gathered in a small conference room in Las Vegas on Friday to test their skills on a new online voting platform. They were eager to learn what digital vulnerabilities exist in the next generation of election systems.

The platform, known as Secure Internet Voting, or SIV, is run by an American company of the same name. It allows people to vote from their phones or computers and is already being used in small pilot programs in the United States.

However, major obstacles remain in the way of its wider adoption: Most states do not allow widespread use of online voting due to security concerns, opting instead for paper ballots that can be audited.

“There are many people who have determined that the only way to do this is to create an insecure internet vote,” SIV founder David Ernst told Reuters at the conference.