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Biometrics security is a dynamic research area spurred by the need to protect personal traits from threats like theft, non-authorised distribution, reuse and so on. A widely investigated solution to such threats consists in processing the…

Cryptography and Security · Computer Science 2018-03-29 Giulia Droandi , Mauro Barni , Riccardo Lazzeretti , Tommaso Pignata

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

The prevalence of biometric authentication has been on the rise due to its ease of use and elimination of weak passwords. To date, most biometric authentication systems have been designed for on-device authentication of the device owner…

Cryptography and Security · Computer Science 2026-04-29 Alexander Bienstock , Daniel Escudero , Antigoni Polychroniadou , Zhen Zeng , Pranav Bhat , Ashok Singal , Prashant Sharma , Manuela Veloso

BIOMETRICS are an important and widely used class of methods for identity verification and access control. Biometrics are attractive because they are inherent properties of an individual. They need not be remembered like passwords, and are…

Cryptography and Security · Computer Science 2017-04-26 Shantanu Rane , Ye Wang , Stark. C. Draper , Prakash Ishwar

Attacks targeting several millions of non-internet based application users are on the rise. These applications such as SMS and USSD typically do not benefit from existing multi-factor authentication methods due to the nature of their…

Cryptography and Security · Computer Science 2020-10-16 Andrew Kinai , Fred Otieno , Nelson Bore , Komminist Weldemariam

Nowadays, most online services offer different authentication methods that users can set up for multi-factor authentication but also as a recovery method. This configuration must be done thoroughly to prevent an adversary's access while…

Cryptography and Security · Computer Science 2024-03-25 Andre Büttner , Nils Gruschka

In 2004, Das, Saxena and Gulati proposed a dynamic ID-based remote user authentication scheme which has many advantage such as no verifier table, user freedom to choose and change password and so on. However the subsequent papers have shown…

Cryptography and Security · Computer Science 2010-07-15 Mohammed Aijaz Ahmed , D. Rajya Lakshmi , Sayed Abdul Sattar

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

Mobile authentication is indispensable for preventing unauthorized access to multi-touch mobile devices. Existing mobile authentication techniques are often cumbersome to use and also vulnerable to shoulder-surfing and smudge attacks. This…

Cryptography and Security · Computer Science 2014-02-07 Jingchao Sun , Rui Zhang , Jinxue Zhang , Yanchao Zhang

Although it is common for users to select bad passwords that can be easily cracked by attackers, password-based authentication remains the most widely-used method. To encourage users to select good passwords, enterprises often enforce…

Cryptography and Security · Computer Science 2015-12-21 Cem S. Sahin , Robert Lychev , Neal Wagner

Group Authentication Schemes (GAS) are methodologies developed to verify the membership of multiple users simultaneously. These schemes enable the concurrent authentication of several users while eliminating the need for a certification…

Cryptography and Security · Computer Science 2025-12-04 Oylum Gerenli , Gunes Karabulut-Kurt , Enver Ozdemir

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

In an open network environment, privacy of group communication and integrity of the communication data are the two major issues related to secured information exchange. The required level of security may be achieved by authenticating a…

Cryptography and Security · Computer Science 2014-10-16 Dipak Kumar Kole , Subhadip Basu

Gestures are a topic of increasing interest in authentication and successful implementation as a security layer requires reliable gesture recognition. So far much work focuses on new ways to recognize gestures, leaving discussion on the…

Cryptography and Security · Computer Science 2014-08-28 Gradeigh D. Clark , Janne Lindqvist

Today, two-factor authentication (2FA) is a widely implemented mechanism to counter phishing attacks. Although much effort has been investigated in 2FA, most 2FA systems are still vulnerable to carefully designed phishing attacks, and some…

Cryptography and Security · Computer Science 2021-09-02 Yuanyi Sun , Sencun Zhu , Yao Zhao , Pengfei Sun

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

In the not so unlikely scenario of total compromise of computers accessible to a group of users, they might be tempted to resort to human-computable paper-and-pencil cryptographic methods aided by a classic Tabula Recta, which helps to…

Cryptography and Security · Computer Science 2023-12-06 Francisco Ruiz

Face recognition from image or video is a popular topic in biometrics research. Many public places usually have surveillance cameras for video capture and these cameras have their significant value for security purpose. It is widely…

Computer Vision and Pattern Recognition · Computer Science 2013-02-27 Faizan Ahmad , Aaima Najam , Zeeshan Ahmed

Using physical interactive devices like mouse and keyboards hinders naturalistic human-machine interaction and increases the probability of surface contact during a pandemic. Existing gesture-recognition systems do not possess user…

Human-Computer Interaction · Computer Science 2022-09-08 Ankit Jha , Ishita , Pratham G. Shenwai , Ayush Batra , Siddharth Kotian , Piyush Modi

This paper proposes a frictionless authentication system, provides a comprehensive security analysis of and proposes potential solutions for this system. It first presents a system that allows users to authenticate to services in a…

Cryptography and Security · Computer Science 2018-02-21 Mustafa A. Mustafa , Aysajan Abidin , Enrique Argones Rúa