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In this work, we investigate the concept of biometric backdoors: a template poisoning attack on biometric systems that allows adversaries to stealthily and effortlessly impersonate users in the long-term by exploiting the template update…

Cryptography and Security · Computer Science 2020-11-06 Giulio Lovisotto , Simon Eberz , Ivan Martinovic

The proliferation of malicious deepfake applications has ignited substantial public apprehension, casting a shadow of doubt upon the integrity of digital media. Despite the development of proficient deepfake detection mechanisms, they…

Cryptography and Security · Computer Science 2024-03-12 Hong Sun , Ziqiang Li , Lei Liu , Bin Li

Evaluating the risk level of adversarial images is essential for safely deploying face authentication models in the real world. Popular approaches for physical-world attacks, such as print or replay attacks, suffer from some limitations,…

Computer Vision and Pattern Recognition · Computer Science 2023-11-21 Sai Amrit Patnaik , Shivali Chansoriya , Anil K. Jain , Anoop M. Namboodiri

Face recognition systems are widely deployed for biometric authentication. Despite this, it is well-known that, without any safeguards, face recognition systems are highly vulnerable to presentation attacks. In response to this security…

Computer Vision and Pattern Recognition · Computer Science 2023-08-29 M. Ibsen , C. Rathgeb , F. Brechtel , R. Klepp , K. Pöppelmann , A. George , S. Marcel , C. Busch

Currently, it is ever more common to access online services for activities which formerly required physical attendance. From banking operations to visa applications, a significant number of processes have been digitised, especially since…

Computer Vision and Pattern Recognition · Computer Science 2022-11-02 Daniel Benalcazar , Juan E. Tapia , Sebastian Gonzalez , Christoph Busch

Face Recognition Systems (FRS) have increasingly integrated into critical applications, including surveillance and user authentication, highlighting their pivotal role in modern security systems. Recent studies have revealed vulnerabilities…

Cryptography and Security · Computer Science 2024-06-11 Jiahao Chen , Zhiqiang Shen , Yuwen Pu , Chunyi Zhou , Changjiang Li , Jiliang Li , Ting Wang , Shouling Ji

The vulnerability of facial recognition systems to face morphing attacks is well known. Many different approaches for morphing attack detection have been proposed in the scientific literature. However, the morphing attack detection…

Cryptography and Security · Computer Science 2020-04-06 Ulrich Scherhag , Christian Rathgeb , Johannes Merkle , Christoph Busch

Fake images in selfie banking are increasingly becoming a threat. Previously, it was just Photoshop, but now deep learning technologies enable us to create highly realistic fake identities, which fraudsters exploit to bypass biometric…

Cryptography and Security · Computer Science 2025-08-28 Subhrojyoti Mukherjee , Manoranjan Mohanty

Iris biometrics is a phenotypic biometric trait that has proven to be agnostic to human natural physiological changes. Research on iris biometrics has progressed tremendously, partly due to publicly available iris databases. Various…

Computer Vision and Pattern Recognition · Computer Science 2023-02-28 Jawad Muhammad , Yunlong Wang , Junxing Hu , Kunbo Zhang , Zhenan Sun

This paper presents an analysis of how the iris recognition is impacted by eye diseases and an appropriate dataset comprising 2996 iris images of 230 distinct eyes (including 184 illness-affected eyes representing more than 20 different eye…

Computer Vision and Pattern Recognition · Computer Science 2018-09-17 Mateusz Trokielewicz , Adam Czajka , Piotr Maciejewicz

The accurate detection of ID card Presentation Attacks (PA) is becoming increasingly important due to the rising number of online/remote services that require the presentation of digital photographs of ID cards for digital onboarding or…

Computer Vision and Pattern Recognition · Computer Science 2023-12-22 Reuben Markham , Juan M. Espin , Mario Nieto-Hidalgo , Juan E. Tapia

Biometric technologies are widely adopted in security, legal, and financial systems. Face recognition can authenticate a person based on the unique facial features such as shape and texture. However, recent works have demonstrated the…

Computer Vision and Pattern Recognition · Computer Science 2025-11-05 Poulami Raha , Yeongnam Chae

In the recent past, different researchers have proposed privacy-enhancing face recognition systems designed to conceal soft-biometric attributes at feature level. These works have reported impressive results, but generally did not consider…

Computer Vision and Pattern Recognition · Computer Science 2022-05-18 Dailé Osorio-Roig , Christian Rathgeb , Pawel Drozdowski , Philipp Terhörst , Vitomir Štruc , Christoph Busch

The gaze behavior of virtual avatars is critical to social presence and perceived eye contact during social interactions in Virtual Reality. Virtual Reality headsets are being designed with integrated eye tracking to enable compelling…

Human-Computer Interaction · Computer Science 2020-03-10 Brendan John , Sophie Jörg , Sanjeev Koppal , Eakta Jain

Iris-based biometric systems are vulnerable to presentation attacks (PAs), where adversaries present physical artifacts (e.g., printed iris images, textured contact lenses) to defeat the system. This has led to the development of various…

Computer Vision and Pattern Recognition · Computer Science 2025-04-28 Debasmita Pal , Redwan Sony , Arun Ross

Nowadays, the adoption of face recognition for biometric authentication systems is usual, mainly because this is one of the most accessible biometric modalities. Techniques that rely on trespassing these kind of systems by using a forged…

Computer Vision and Pattern Recognition · Computer Science 2019-02-11 Rodrigo Bresan , Allan Pinto , Anderson Rocha , Carlos Beluzo , Tiago Carvalho

The capability of doing effective forensic analysis on printed and scanned (PS) images is essential in many applications. PS documents may be used to conceal the artifacts of images which is due to the synthetic nature of images since these…

Computer Vision and Pattern Recognition · Computer Science 2023-04-07 Ehsan Nowroozi , Yoosef Habibi , Mauro Conti

Iris recognition is increasingly used in large-scale applications. As a result, presentation attack detection for iris recognition takes on fundamental importance. This survey covers the diverse research literature on this topic. Different…

Computer Vision and Pattern Recognition · Computer Science 2018-06-14 Adam Czajka , Kevin W. Bowyer

Face forgery generation technologies generate vivid faces, which have raised public concerns about security and privacy. Many intelligent systems, such as electronic payment and identity verification, rely on face forgery detection.…

Computer Vision and Pattern Recognition · Computer Science 2025-11-13 Zhaoyu Chen , Bo Li , Kaixun Jiang , Shuang Wu , Shouhong Ding , Wenqiang Zhang

This paper presents the experimental study revealing weaker performance of the automatic iris recognition methods for cataract-affected eyes when compared to healthy eyes. There is little research on the topic, mostly incorporating scarce…

Computer Vision and Pattern Recognition · Computer Science 2018-09-05 Mateusz Trokielewicz , Adam Czajka , Piotr Maciejewicz