Research Publications

List of publications (Google Scholar| Citations: 950+, h-index: 13, i-10 index: 15)

• Aditya Sharma, Vinti Agarwal, Rajesh Kumar, "G-Loss: Graph-Guided Fine-Tuning of Language Models", Learning on Graphs (LoG) Conference, 2025.  

• Rebira Jemma and Rajesh Kumar. How well do LLMs imitate human writing style? Paper presented at the IEEE Annual Ubiquitous Computing, Electronics & Mobile Communication Conference (UEMCON 2025), New York, NY, United States. [pdf]

• DH Roh and R Kumar, "Active Authentication via Korean Keystrokes Under Varying LLM Assistance and Cognitive Contexts", 24th IEEE International Conference on Machine Learning and Applications (ICMLA), [Full regular paper accept rate 25%] [pdf]

• D Roh, R Kumar, A Ngo, "LLM-Assisted Cheating Detection in Korean Language via Keystrokes", The IEEE International Joint Conference on Biometrics (IJCB 2025) [pdf] [Accept rate: ~39%]

• Apoorva Gulati, Rajesh Kumar, Vinti Agarwal, Aditya Sharma, "Weak Links in LinkedIn: Enhancing Fake Profile Detection in the Age of LLMs", The 17th International Conference on Advances in Social Networks Analysis, 2025 [Accept Rate: 25%]. First-ever paper for Apoorva and Aditya. [webpage] [pdf] [code]

• S Gupta, R Kumar, KB Raja, B Crispo, C Maple, "Evaluating Robustness of a Bimodal User Verification System against Synthetic Data Attacks", 22nd International Conference on Security and Cryptography, 2025 [pdf]

• D Kundu, A Mehta, R Kumar, N Lal, A Anand, A Singh, RR Shah, "Keystroke Dynamics Against Academic Dishonesty in the Age of LLMs," The IEEE International Joint Conference on Biometrics (IJCB), 2024 [pdf][code] [ppt] [Accept rate: 32.2%] Received The Best Paper Award of IJCB 2024

• A Ngo, R Kumar, P Cao, "Deep Generative Attacks and Countermeasures for Data-Driven Offline Signature Verification," The IEEE International Joint Conference on Biometrics (IJCB), 2024, [pdf][code] [Accept rate: 32.2%]

• A Kuruvilla, R Daley, R Kumar, "Spotting Fake Profiles in Social Networks via Keystroke Dynamics," to appear in IEEE Consumer Communications & Networking Conference (CCNC 2024) Average accept rate--24.4% [pdf] [code and dataset] [presentation video]

• R Kumar, C Isik, CK Mohan, "Dictionary Attack on IMU-based Gait Authentication," Artificial Intelligence and Security co-located with (ACM CCS 2023), Copenhagen [pdf] [code and dataset]

• V Khurana, Y Kumar, H Nora, R Kumar, B Krishnamurthy, "Synthesizing Human Gaze Feedback for Improved NLP Performance," to appear in the 17th Conference of the European Chapter of the Association for Computational Linguistics (EACL 2023) [pdf] [video]

• M Agrawal, P Mehrotra, R Kumar, and R R Shah, "GANTouch: An Attack-Resilient Framework for Touch-based Continuous Authentication System," IEEE Transactions on Biometrics, Behavior, and Identity Science, 2022 [pdf]

• Jun H. Mo and Rajesh Kumar, "iCTGAN--An Attack Mitigation Technique for Random-vector Attack on Accelerometer-based Gait Authentication Systems," featured among the best-reviewed papers at IEEE International Joint Conference on Biometrics (IJCB), 2022 [pdf]

• S Gupta, R Kumar, M Kacimi, B Crispo, "IDeAuth: A Novel Behavioral Biometric-based Implicit Deauthentication Scheme for Smartphones," Pattern Recognition Letters, Elsevier, 2022 [pdf] [dataset]

• P Mehrotra, M Agrawal, R Kumar, R Shah, "Defending Touch-based Continuous Authentication Systems from Active Adversaries Using Generative Adversarial Networks", featured among the best-reviewed papers at IEEE International Joint Conference on Biometrics (IJCB), [pdf]

• R Kumar, C Isik, and VVPhoha, "Treadmill Assisted Gait Spoofing (TAGS): An Emerging Threat to Wearable Sensor-based Gait Authentication," ACM Journal of Digital Threats: Research and Practice, 2021 [pdf]

• Vishaal Udandarao, Mohit Agrawal, R Kumar,  RR Shah, "On the Inference of Soft Biometrics from Typing Patterns Collected in a Multi-device Environment", The Sixth IEEE International Conference on Multimedia Big Data, 2020 [pdf] [Code]

• *S Rustagi and *A Garg, PR Anand, R Kumar,  Y Kumar, RR Shah, "Touchless Typing Using Head Movement-based Gestures", The Sixth IEEE International Conference on Multimedia Big Data, 2020 [pdf] (*Authors contributed equally)

• R Kumar, PP Kundu, VV Phoha, "Continuous Authentication Using One-class Classifiers and their Fusion", IEEE ISBA, International Conference on Identity, Security and Behavior Analysis, 2018, supported in part by National Science Foundation Award SaTC #1527795 [pdf]

• PK Bera, R Kumar, C Isik "Identification of Internal Faults in Indirect Symmetrical Phase Shift Transformers Using Ensemble Learning", IEEE ISSPIT, 18th IEEE International Symposium on Signal Processing and Information Technology, 2018 [pdf]

• R Kumar, PP Kundu, D Shukla, VV Phoha "Continuous User Authentication via Unlabeled Phone Movement Patterns", IEEE IJCB, International Joint Conference on Biometrics, 2017, supported in part by DARPA Active Authentication contract FA #8750-13-2-0274 and by National Science Foundation Award SaTC #1527795.  [pdf]

• A Serwadda, VV Phoha, Z Wang, R Kumar, D Shukla, "Toward Robotic Robbery on the Touch Screen", ACM Transactions on Information and System Security (TISSEC), 2016; Impact Factor: 4.8, the top ACM Transactions on Privacy and Security. Supported in part by DARPA Active Authentication contract: FA 8750-13-2-0274 and by National Science Foundation Award Number: 1527795. Impact: Altmetric – Toward Robotic Robbery on the Touch Screen [pdf]. 

• R Kumar, VV Phoha, R Raina, "Authenticating Users Through Their Arm Movement Patterns," Computer Vision and Pattern Recognition (arxiv/cs.cv) 2016 [pdf]

• R Kumar, VV Phoha, A Serwadda, "Continuous Authentication of Smartphone Users by Fusing Typing, Swiping, and Phone Movement Patterns," IEEE BTAS, International Conference on Biometrics: Theory, Applications, and Systems, 2016. Supported in part by the DARPA Active Authentication contract (FA 8750-13-2-0274) and the National Science Foundation Award (SA Te Number: 1527795). [pdf]

• R Kumar, VV Phoha, A Jain, "Treadmill Attack on Gait-based Authentication Systems," IEEE BTAS, International Conference on Biometrics: Theory, Applications, and Systems, 2015. Partly supported by the DARPA Active Authentication grant FA8750-13-2-0274. [pdf]

• R Kumar, S Kumar, D Shukla, RS Raw, OP Kaiwartya, "Geometrical Localization Algorithm for Three Dimensional Wireless Sensor Networks," International Journal of Wireless Personal Communications, 2014 Impact Factor: 2.2 [pdf]

• A Primo, VV Phoha, R Kumar, A Serwadda, "Context-aware Active Authentication Using Smartphone Accelerometer Measurements," IEEE CVPR, Proceedings of Computer Vision and Pattern Recognition Workshops (CVPRW), 2014. This paper received the *Highest-Impact Paper* award at the CVPR Workshop on Biometrics 2018 [pdf]

• D Shukla, R Kumar, A Serwadda, VV Phoha, "Beware, your hands reveal your secrets!", ACM CCS, Conference on Computer and Communications Security, 2014. Partly supported by the DARPA Active Authentication grant FA8750-13-2-0274. [pdf] Impact: Altmetric – Beware, Your Hands Reveal Your Secrets!