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Auflistung nach Autor:in "Schmidt, Axel"

1 - 5 von 5
  • Konferenzbeitrag
    Classifying privacy and verifiability requirements for electronic voting
    (Informatik 2009 – Im Focus das Leben, 2009) Langer, Lucie; Schmidt, Axel; Volkamer, Melanie; Buchmann, Johannes
  • Konferenzbeitrag
    Elektronische Wahlen: Verifizierung vs. Zertifizierung
    (Informatik 2009 – Im Focus das Leben, 2009) Volkamer, Melanie; Schryen, Guido; Langer, Lucie; Schmidt, Axel; Buchmann, Johannes
  • Konferenzbeitrag
    An evaluation and certification approach to enable voting service providers
    (4th International Conference on Electronic Voting 2010, 2010) Schmidt, Axel; Volkamer, Melanie; Buchmann, Johannes
    In this paper we provide an evaluation and certification approach for Voting Service Providers (VSPs) which combines the evaluation of the electronic voting system and the operational environment for the first time. The VSP is a qualified institution which combines a secure voting system and a secure operational environment to provide secure remote electronic elections as a service [La08]. This centralized approach facilitates legal regulation and evaluation. So far, a legal regulation framework for VSPs has been developed which demands evaluation and certification of the VSP [Sc09a]. Therefore the VSP is required to provide a security concept in which it demonstrates satisfaction of the security requirements defined in the legal regulation. However neither the content of this security concept nor an adequate evaluation methodology has been specified so far. We therefore developed a security concept template and a comprehensive evaluation methodology for the VSP, which includes both the voting system and operational environment of VSPs. Our proposal incorporates existing evaluation methodologies to facilitate evaluation and certification. With this paper and the legal regulation a realistic approach to enable the VSP concept is accomplished.
  • Konferenzbeitrag
    A pervasively verifiable online voting scheme
    (INFORMATIK 2008. Beherrschbare Systeme – dank Informatik. Band 1, 2008) Langer, Lucie; Schmidt, Axel; Araújo, Roberto
    We present an improvement of Ohkubo et al.’s e-voting protocol [OMA+99]: We provide that the validator’s signature is attached directly to the vote although the vote has been encrypted before. Thus verifiability does not end before tallying like in the original scheme but is pervasive even beyond the end of the election. This prevents manipulation of the plaintext votes and offers verifiability to the public instead of restricting it to the talliers. Moreover, privacy can be ensured without using blind signatures, which facilitates receipt-freeness. Our variant of the scheme also allows the voter to seemingly comply with the demand of a coercer while actually casting the vote she intended.
  • Konferenzbeitrag
    Towards the impact of the operational environment on the security of e-voting
    (Informatik 2009 – Im Focus das Leben, 2009) Schmidt, Axel; Volkamer, Melanie; Langer, Lucie; Buchmann, Johannes