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Implicit authentication consists of a server authenticating a user based on the user's usage profile, instead of/in addition to relying on something the user explicitly knows (passwords, private keys, etc.). While implicit authentication…

Cryptography and Security · Computer Science 2015-03-03 Josep Domingo-Ferrer , Qianhong Wu , Alberto Blanco-Justicia

Password authentication is the most commonly used technique to authenticate the user validity. However, due to its simplicity, it is vulnerable to pseudo attacks. It can be enhanced using various biometric techniques such as thumb…

Cryptography and Security · Computer Science 2011-08-04 Hazarath Munaga , J. V. R. Murthy , N. B. Venkateswarlu

Keyloggers remain a serious threat in modern cybersecurity, silently capturing user keystrokes to steal credentials and sensitive information. Traditional defenses focus mainly on detection and removal, which can halt malicious activity but…

Cryptography and Security · Computer Science 2025-08-07 Md Sajidul Islam Sajid , Shihab Ahmed , Ryan Sosnoski

Behavioral biometrics-based continuous authentication is a promising authentication scheme, which uses behavioral biometrics recorded by built-in sensors to authenticate smartphone users throughout the session. However, current continuous…

Human-Computer Interaction · Computer Science 2026-01-08 Mingming Hu , Kun Zhang , Ruibang You , Bibo Tu

Keystroke dynamics is a promising modality for active user authentication, but its effectiveness under varying LLM-assisted typing and cognitive conditions remains understudied. Using data from 50 users and cognitive labels from Bloom's…

Cryptography and Security · Computer Science 2025-09-30 Dong Hyun Roh , Rajesh Kumar

The majority of systems rely on user authentication on passwords, but passwords have so many weaknesses and widespread use that easily raise significant security concerns, regardless of their encrypted form. Users hold the same password for…

Cryptography and Security · Computer Science 2021-01-22 Vassilis Papaspirou , Leandros Maglaras , Mohamed Amine Ferrag , Ioanna Kantzavelou , Helge Janicke , Christos Douligeris

User profiling is a critical component of adaptive risk-based authentication, yet it raises significant privacy concerns, particularly when handling sensitive data. Profiling involves collecting and aggregating various user features,…

Cryptography and Security · Computer Science 2025-08-05 Yaser Baseri , Abdelhakim Senhaji Hafid , Dimitrios Makrakis

Passwords remain a widely-used authentication mechanism, despite their well-known security and usability limitations. To improve on this situation, next-generation authentication mechanisms, based on behavioral biometric factors such as eye…

Cryptography and Security · Computer Science 2025-05-06 Matin Fallahi , Patricia Arias Cabarcos , Thorsten Strufe

Password security has been compelled to evolve in response to the growing computational capabilities of modern systems. However, this evolution has often resulted in increasingly complex security practices that alienate users, leading to…

Cryptography and Security · Computer Science 2025-10-14 Tonmoy Ghosh

As automation bot technology and Artificial Intelligence is evolving rapidly, conventional human verification techniques like voice CAPTCHAs and knowledge-based authentication are becoming less effective. Bots and scrapers with Artificial…

Cryptography and Security · Computer Science 2025-11-12 Aditya Mitra , Sibi Chakkaravarthy Sethuraman , Devi Priya V S

A simple and practical method for achieving everlasting privacy in e-voting systems, without relying on advanced cryptographic techniques, is to use anonymous voter credentials. The simplicity of this approach may, however, create some…

Cryptography and Security · Computer Science 2025-11-14 Tomasz Truderung

Cause of a rapid increase in technological development, increasing identity theft, consumer fraud, the threat to personal data is also increasing every day. Methods developed earlier to ensure personal the information from the thefts was…

Computer Vision and Pattern Recognition · Computer Science 2020-04-13 Sher Dadakhanov

Smartphones are now frequently used by end-users as the portals to cloud-based services, and smartphones are easily stolen or co-opted by an attacker. Beyond the initial log-in mechanism, it is highly desirable to re-authenticate end-users…

Cryptography and Security · Computer Science 2017-03-13 Wei-Han Lee , Ruby Lee

Authentication of smartphone users is important because a lot of sensitive data is stored in the smartphone and the smartphone is also used to access various cloud data and services. However, smartphones are easily stolen or co-opted by an…

Cryptography and Security · Computer Science 2017-09-01 Wei-Han Lee , Ruby B. Lee

Auditing differential privacy has emerged as an important area of research that supports the design of privacy-preserving mechanisms. Privacy audits help to obtain empirical estimates of the privacy parameter, to expose flawed…

Cryptography and Security · Computer Science 2025-09-25 Önder Askin , Tim Kutta , Holger Dette

The growing trend of using wearable devices for context-aware computing and pervasive sensing systems has raised its potentials for quick and reliable authentication techniques. Since personal writing habitats differ from each other, it is…

Human-Computer Interaction · Computer Science 2017-10-24 Qi Lyu , Zhifeng Kong , Chao Shen , Tianwei Yue

With the increased popularity of smart phones, there is a greater need to have a robust authentication mechanism that handles various security threats and privacy leakages effectively. This paper studies continuous authentication for touch…

Cryptography and Security · Computer Science 2017-12-25 Aditi Roy , Tzipora Halevi , Nasir Memon

We consider a new concept of biometric-based cybersecurity systems for active authentication by continuous tracking, which utilizes biochemical processing of metabolites present in skin secretions. Skin secretions contain a large number of…

Cryptography and Security · Computer Science 2017-09-22 Juliana Agudelo , Vladimir Privman , Jan Halamek

As nowadays most web application requests originate from mobile devices, authentication of mobile users is essential in terms of security considerations. To this end, recent approaches rely on machine learning techniques to analyze various…

Cryptography and Security · Computer Science 2024-10-28 David Monschein , Oliver P. Waldhorst

We investigate whether a classifier can continuously authenticate users based on the way they interact with the touchscreen of a smart phone. We propose a set of 30 behavioral touch features that can be extracted from raw touchscreen logs…

Cryptography and Security · Computer Science 2013-01-08 Mario Frank , Ralf Biedert , Eugene Ma , Ivan Martinovic , Dawn Song