I am currently doing some research on universally verifiable mixnets, but it seems to me that there are too few papers about them after 2006 or so and most of them come from the team of Douglas Winkstrom. Is this correct; Can anybody point me to current references about mixnets and their use in voting protocols; Thanks
By this point, mixnets are pretty mature technology. The main reason you aren't finding many recent papers is they just work. Instead, most of the research effort has been devoted to building larger systems (sometimes using mixnet as just one of many building blocks).