Stamm, Christoph

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Christoph
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Stamm, Christoph

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Autor:in: Arnosti, Christof ×

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    Publikation
    Secure Physical Access with NFC-enabled Smartphones
    (Fachhochschule Nordwestschweiz FHNW, Institut für Mobile und Verteilte Systeme, 12/2015) Arnosti, Christof; Gruntz, Dominik; Hauri, Marco; Stamm, Christoph [in: IMVS Fokus Report 2015]
    This paper presents a smartphone-based physical access control system in which the access points are not directly connected to a central authorization server. The access points ask the mobile phone whether a particular user has access or not. The mobile phone then relays such a request to the access server. The authentication of the smartphone is based on public-key cryptography. This requires that the private key is stored in a secure element or in a trusted execution environment to prevent identity theft. In our solution we use the following secure element archiectures: Host Card Emulation (HCE) and a microSD-based secure element. We show that the HCE approach cannot solve the relay attack under conservative security assumptions and we present and discuss an implementation based on a microSD secure element that still allows the access points to connect to the authorization server upon every access albeit the access points are not connected with it.
    04A - Beitrag Sammelband