We provide the first comprehensive study of user-chosen 4-and 6-digit PINs (n= 1220)
collected on smartphones with participants being explicitly primed for device unlocking. We …

In this article, we provide the first comprehensive study of user-chosen four-and six-digit
PINs (n= 1705) collected on smartphones with participants being explicitly primed for device …

Passwordless authentication is a trending theme in cyber security, while biometrics
gradually replace knowledge-based schemes. However, Personal Identification Numbers …

Android patterns remain a popular method for unlocking smartphones, despite evidence
suggesting that many users choose easily guessable patterns. In this paper, we explore the …

Android unlock patterns are still commonly used, and roughly 25% of the respondents to our
study use a pattern when unlocking their phone. Despite security issues, the design of the …

Human-chosen passwords are often short, selected non-uniformly, and thus, susceptible to
automated guessing attacks. To help users to select more secure but memorable …

Security mechanisms based on patterns, such as Pattern Lock, are commonly used to
prevent unauthorized access. They introduce several benefits, such as ease of use, an …

Usability and Security of Risk-based Authentication Page 1 Usability and Security of Risk-based
Authentication Philipp Markert Thesis Defense • July 28, 2023 • Bochum Page 2 Thesis Defense …

Wissensbasierte Authentifizierungsmethoden (Englisch: knowledge-based authenticators,
KBAs), wie Passwörter und Persönliche Identifikationsnummern (PINs), werden oft aus einer …

Passwordless authentication is a trending theme in cyber security, while biometrics
gradually replace knowledge-based schemes. However, Personal Identification Numbers …