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Risk-based authentication (RBA) aims to protect users against attacks involving stolen passwords. RBA monitors features during login, and requests re-authentication when feature values widely differ from previously observed ones. It is…

Cryptography and Security · Computer Science 2022-11-11 Stephan Wiefling , Paul René Jørgensen , Sigurd Thunem , Luigi Lo Iacono

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…

Cryptography and Security · Computer Science 2020-09-15 Stephan Wiefling , Tanvi Patil , Markus Dürmuth , Luigi Lo Iacono

Risk-based authentication (RBA) is an adaptive security measure to strengthen password-based authentication. RBA monitors additional implicit features during password entry such as device or geolocation information, and requests additional…

Cryptography and Security · Computer Science 2020-03-18 Stephan Wiefling , Luigi Lo Iacono , Markus Dürmuth

Risk-based authentication (RBA) extends authentication mechanisms to make them more robust against account takeover attacks, such as those using stolen passwords. RBA is recommended by NIST and NCSC to strengthen password-based…

Cryptography and Security · Computer Science 2023-01-05 Stephan Wiefling , Jan Tolsdorf , Luigi Lo Iacono

Risk-based authentication (RBA) aims to strengthen password-based authentication rather than replacing it. RBA does this by monitoring and recording additional features during the login process. If feature values at login time differ…

Cryptography and Security · Computer Science 2021-10-26 Stephan Wiefling , Markus Dürmuth , Luigi Lo Iacono

Online services have difficulties to replace passwords with more secure user authentication mechanisms, such as Two-Factor Authentication (2FA). This is partly due to the fact that users tend to reject such mechanisms in use cases outside…

Cryptography and Security · Computer Science 2023-03-23 Vincent Unsel , Stephan Wiefling , Nils Gruschka , Luigi Lo Iacono

Risk-based authentication (RBA) is used in online services to protect user accounts from unauthorized takeover. RBA commonly uses contextual features that indicate a suspicious login attempt when the characteristic attributes of the login…

Cryptography and Security · Computer Science 2024-03-19 Andre Büttner , Andreas Thue Pedersen , Stephan Wiefling , Nils Gruschka , Luigi Lo Iacono

Risk-based authentication (RBA) aims to protect end-users against attacks involving stolen or otherwise guessed passwords without requiring a second authentication method all the time. Online services typically set limits on what is still…

Cryptography and Security · Computer Science 2023-08-30 Jan-Phillip Makowski , Daniela Pöhn

The proliferation of Internet services has led to an increasing need to protect private data. User authentication serves as a crucial mechanism to ensure data security. Although robust authentication forms the cornerstone of remote service…

Cryptography and Security · Computer Science 2024-12-18 Hamidreza Fereidouni , Abdelhakim Senhaji Hafid , Dimitrios Makrakis , Yaser Baseri

Security vulnerabilities of traditional single factor authentication has become a major concern for security practitioners and researchers. To mitigate single point failures, new and technologically advanced Multi-Factor Authentication…

Cryptography and Security · Computer Science 2019-08-19 Sanchari Das , Bingxing Wang , Zachary Tingle , L. Jean Camp

To prevent password breaches and guessing attacks, banks increasingly turn to two-factor authentication (2FA), requiring users to present at least one more factor, such as a one-time password generated by a hardware token or received via…

Cryptography and Security · Computer Science 2015-01-20 Kat Krol , Eleni Philippou , Emiliano De Cristofaro , M. Angela Sasse

Passwords have been long used as the primary authentication method for web services. Weak passwords used by the users have prompted the use of password management tools and two-factor authentication to ensure better account security. While…

Cryptography and Security · Computer Science 2025-01-27 Pratyush Choudhary , Subhrajit Das , Mukul Paras Potta , Prasuj Das , Abhishek Bichhawat

We propose a two-factor authentication (2FA) mechanism called 2D-2FA to address security and usability issues in existing methods. 2D-2FA has three distinguishing features: First, after a user enters a username and password on a login…

Cryptography and Security · Computer Science 2021-11-01 Maliheh Shirvanian , Shashank Agrawal

To protect users from data breaches and phishing attacks, service providers typically implement two-factor authentication (2FA) to add an extra layer of security against suspicious login attempts. However, since 2FA can sometimes hinder…

Cryptography and Security · Computer Science 2024-11-19 Zhi Wang , Xin Yang , Du Chen , Han Gao , Meiqi Tian , Yan Jia , Wanpeng Li

Two-factor authentication (2F) aims to enhance resilience of password-based authentication by requiring users to provide an additional authentication factor, e.g., a code generated by a security token. However, it also introduces…

Cryptography and Security · Computer Science 2014-02-03 Emiliano De Cristofaro , Honglu Du , Julien Freudiger , Greg Norcie

Traditional single-factor authentication possesses several critical security vulnerabilities due to single-point failure feature. Multi-factor authentication (MFA), intends to enhance security by providing additional verification steps.…

Cryptography and Security · Computer Science 2019-08-19 Sanchari Das , Bingxing Wang , L. Jean Camp

Rolling out a new security mechanism in an organisation requires planning, good communication, adoption from users, iterations of reflection on the challenges experienced and how they were overcome. Our case study elicited users'…

Cryptography and Security · Computer Science 2020-11-06 Abideen Tetlay , Helen Treharne , Tom Ascroft , Sotiris Moschoyiannis

The digital age requires strong security measures to protect online activities. Two-Factor Authentication (2FA) has emerged as a critical solution. However, its implementation presents significant challenges, particularly in terms of…

Cryptography and Security · Computer Science 2025-02-18 Alexander Lengert

The traditional two-factor authentication (2FA) methods primarily rely on the user manually entering a code or token during the authentication process. This can be burdensome and time-consuming, particularly for users who must be…

Cryptography and Security · Computer Science 2024-01-15 Ali Abdullah S. AlQahtani , Thamraa Alshayeb , Mahmoud Nabil , Ahmad Patooghy

Multi-Factor Authentication is intended to strengthen the security of password-based authentication by adding another factor, such as hardware tokens or one-time passwords using mobile apps. However, this increased authentication security…

Cryptography and Security · Computer Science 2023-09-20 Sabrina Amft , Sandra Höltervennhoff , Nicolas Huaman , Alexander Krause , Lucy Simko , Yasemin Acar , Sascha Fahl
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