Norway recently held its second e-voting pilot, following an initial trial that took place during the local government elections in 2011. In the second pilot, e-voting participation increased significantly compared to 2011, according to the Ministry of Local Government and Regional Development. Citizens in 12 municipalities could vote between Aug. 12 and Sept. 6 for the Aug. 9 election. In this year's election, 28 percent of all voters in the trial municipalities voted via the Internet, up from 16 percent in the 2011 pilot. To prove both the trustworthiness and transparency of the pilot, the source code for this year's e-voting system was put into the public domain, enabling citizens to download and study it. The electronic ballot used a public key mechanism for delivery. First, the vote was encrypted so that it could not be tied to the voter's identity. The vote then was digitally signed with the voter's public key, which kept it tamperproof. Each voter was given their own unique set of random codes for the different candidates in the election. Once a vote was cast, the code was texted back to the voter, enabling them to compare the code sent to their phone with the printed code on their voting card.