TY  - CHAP
U1  - Konferenzveröffentlichung
A1  - Wiefling, Stephan
A1  - Patil, Tanvi
A1  - Dürmuth, Markus
A1  - Lo Iacono, Luigi
T1  - Evaluation of Risk-based Re-Authentication Methods
T2  - Hölbl, Rannenberg et al. (Eds.): ICT Systems Security and Privacy Protection. 35th IFIP TC 11 International Conference, SEC 2020, Maribor, Slovenia, September 21–23, 2020, Proceedings
N2  - Risk-based Authentication (RBA) is an adaptive security measure that improves the security of password-based authentication by protecting against credential stuffing, password guessing, or phishing attacks. RBA monitors extra features during login and requests for an additional authentication step if the observed feature values deviate from the usual ones in the login history. In state-of-the-art RBA re-authentication deployments, users receive an email with a numerical code in its body, which must be entered on the online service. Although this procedure has a major impact on RBA's time exposure and usability, these aspects were not studied so far.
We introduce two RBA re-authentication variants supplementing the de facto standard with a link-based and another code-based approach. Then, we present the results of a between-group study (N=592) to evaluate these three approaches. Our observations show with significant results that there is potential to speed up the RBA re-authentication process without reducing neither its security properties nor its security perception. The link-based re-authentication via "magic links", however, makes users significantly more anxious than the code-based approaches when perceived for the first time. Our evaluations underline the fact that RBA re-authentication is not a uniform procedure. We summarize our findings and provide recommendations.
KW  - Risk-based Authentication (RBA)
KW  - Re-authentication
KW  - Usable Security
UN  - https://nbn-resolving.org/urn:nbn:de:hbz:1044-opus-49521
UR  - https://riskbasedauthentication.org/usability/re-authentication/
SN  - 978-3-030-58200-5
SB  - 978-3-030-58200-5
U6  - https://doi.org/10.1007/978-3-030-58201-2_19
DO  - https://doi.org/10.1007/978-3-030-58201-2_19
AX  - 2008.07795
SP  - 280
EP  - 294
PB  - Springer
CY  - Cham
ER  -