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Creators/Authors contains: "Kumar, Abhinav"

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  1. The collective action of actively contractile units embedded in elastic biopolymer networks plays a crucial role in regulating the network's macroscopic mechanical response. Here, we investigate how the macroscopic boundary... 
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  2. Backdoor attacks pose a significant threat to neural networks, enabling adversaries to manipulate model outputs on specific inputs, often with devastating consequences, especially in critical applications. While backdoor attacks have been studied in various contexts, little attention has been given to their practicality and persistence in continual learning, particularly in understanding how the continual updates to model parameters, as new data distributions are learned and integrated, impact the effectiveness of these attacks over time. To address this gap, we introduce two persistent backdoor attacks–Blind Task Backdoor and Latent Task Backdoor–each leveraging minimal adversarial influence. Our blind task backdoor subtly alters the loss computation without direct control over the training process, while the latent task backdoor influences only a single task’s training, with all other tasks trained benignly. We evaluate these attacks under various configurations, demonstrating their efficacy with static, dynamic, physical, and semantic triggers. Our results show that both attacks consistently achieve high success rates across different continual learning algorithms, while effectively evading state-of-the-art defenses, such as SentiNet and I-BAU. 
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  3. Oblivious DNS over HTTPS (ODoH) dataset. This dataset is publicly released as part of ODoH privacy study, titled &; Privacy Analysis of Oblivious DNS over HTTPS: a Website Fingerprinting Study," published in The 55th Annual IEEE/IFIP International Conference on Dependable Systems and Networks (IEEE DSN'25). 
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