The second panel examines the legal and constitutional issues associated with e-voting. There are an array of legal questions—freedom, equality, secrecy, and the like—but auditability is perhaps the most important aspect of the process because it is auditability that gives confidence to the voting process. High level of involvement of technicians raises the question of whether independent audits are possible with e-voting. E-voting requires a legal basis. States should consider creating laws that facilitate pilot testing of e-voting reforms and election reforms generally. Pilot tests also require pilots that start small and grow over time. It also requires research and systematic studies of the pilots.
http://electionupdates.caltech.edu/2006/10/e-voting-conference-in-estonia-3.html
