Auflistung nach Autor:in "Feier, Christian"
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- KonferenzbeitragCoercion-Resistant Internet Voting in Practice(Informatik 2014, 2014) Feier, Christian; Neumann, Stephan; Volkamer, MelanieInternet voting continues to raise interest both among research and society. Throughout the last decades, many Internet voting schemes have been developed, each one providing particular properties such as receipt-freeness or end-to-end verifiability. One attractive scheme is the JCJ / Civitas scheme due to its property of making coercion attacks ineffective. Neumann and Volkamer [NV12] analyzed the scheme and identified significant usability issues. To overcome these drawbacks, the authors extended the original work by integrating smart cards. In a follow-up work, Neumann et al. [NFVK13] conducted a theoretical performance analysis for this extension and improved the extension towards its applicability in real-world elections. Their analysis left several real-world considerations open for future work. The present work addresses these gaps: We present a prototype implementation of the revised extension and assess its real-world performance. Based on this contribution, we are able to conclude that the revised extension is feasible to be used in real-world elections.
- KonferenzbeitragTowards A practical JCJ / civitas implementation(INFORMATIK 2013 – Informatik angepasst an Mensch, Organisation und Umwelt, 2013) Neumann, Stephan; Feier, Christian; Volkamer, Melanie; Koenig, RetoInternet voting continues to enjoy wide interest from both research and practice. Among the Internet voting schemes developed over the last decades, JCJ / Civitas stands out from the masses due to its innovative approach to resist voter coercion. To achieve its ambitious goal, the scheme builds upon particularly restrictive assumptions and an abstract credential handling rendering the scheme impractical for real-world use. At ARES 2012, Neumann and Volkamer presented a proposal which implements several of these assumptions (voter-side assumptions) and the credential handling by the use of smart cards. While addressing these practical shortcomings of JCJ / Civitas, their proposal did not take performance into account, and accordingly its performance has not been evaluated. In the present work, we revise the ARES proposal from a performance perspective in a security-invariant manner. Based on the herein proposed revisions, we are able to conclude that the revised ARES proposal is feasible to be used in real-world elections.