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Learning from noisy data has attracted much attention, where most methods focus on closed-set label noise. However, a more common scenario in the real world is the presence of both open-set and closed-set noise. Existing methods typically…

Machine Learning · Computer Science 2024-02-26 Wenhai Wan , Xinrui Wang , Ming-Kun Xie , Shao-Yuan Li , Sheng-Jun Huang , Songcan Chen

The popularity of encryption mechanisms poses a great challenge to malicious traffic detection. The reason is traditional detection techniques cannot work without the decryption of encrypted traffic. Currently, research on encrypted…

Cryptography and Security · Computer Science 2023-04-10 Zihao Wang , Vrizlynn L. L. Thing

In this paper, we propose HyperVision, a realtime unsupervised machine learning (ML) based malicious traffic detection system. Particularly, HyperVision is able to detect unknown patterns of encrypted malicious traffic by utilizing a…

Cryptography and Security · Computer Science 2023-02-01 Chuanpu Fu , Qi Li , Ke Xu

Network traffic classification has been widely studied to fundamentally advance network measurement and management. Machine Learning is one of the effective approaches for network traffic classification. Specifically, Deep Learning (DL) has…

Networking and Internet Architecture · Computer Science 2020-02-19 Jielun Zhang , Fuhao Li , Feng Ye , Hongyu Wu

In this paper, we propose a privacy-preserving image classification method that uses encrypted images and an isotropic network such as the vision transformer. The proposed method allows us not only to apply images without visual information…

Computer Vision and Pattern Recognition · Computer Science 2022-04-19 AprilPyone MaungMaung , Hitoshi Kiya

Open-World Object Detection (OWOD) enriches traditional object detectors by enabling continual discovery and integration of unknown objects via human guidance. However, existing OWOD approaches frequently suffer from semantic confusion…

Computer Vision and Pattern Recognition · Computer Science 2025-10-02 Anay Majee , Amitesh Gangrade , Rishabh Iyer

We consider the problem of \textit{true} open-world semi-supervised node classification, in which nodes in a graph either belong to known or new classes, with the latter not present during training. Existing methods detect and reject new…

Machine Learning · Computer Science 2024-06-17 Marcel Hoffmann , Lukas Galke , Ansgar Scherp

The widespread adoption of encrypted communication protocols such as HTTPS and TLS has enhanced data privacy but also rendered traditional anomaly detection techniques less effective, as they often rely on inspecting unencrypted payloads.…

Cryptography and Security · Computer Science 2025-05-23 Kalindi Singh , Aayush Kashyap , Aswani Kumar Cherukuri

Data stream processing has become a landmark in modern machine learning applications, with concept drifts and novel class appearances posing the primary challenges faced by sophisticated recognition methods. This work proposes an…

Machine Learning · Computer Science 2026-05-29 Joanna Komorniczak

Traffic classification is vital for cybersecurity, yet encrypted traffic poses significant challenges. We present PacketCLIP, a multi-modal framework combining packet data with natural language semantics through contrastive pretraining and…

Cryptography and Security · Computer Science 2025-03-06 Ryozo Masukawa , Sanggeon Yun , Sungheon Jeong , Wenjun Huang , Yang Ni , Ian Bryant , Nathaniel D. Bastian , Mohsen Imani

Encrypted traffic classification technology is a crucial decision-making information source for network management and security protection. It has the advantages of excellent response timeliness, large-scale data bearing, and…

Networking and Internet Architecture · Computer Science 2025-01-09 Zihan Chen , Guang Cheng , Jinhui Li , Tian Qin , Yuyang Zhou , Xing Luan

In deep metric learning for visual recognition, the calibration of distance thresholds is crucial for achieving desired model performance in the true positive rates (TPR) or true negative rates (TNR). However, calibrating this threshold…

Computer Vision and Pattern Recognition · Computer Science 2024-03-26 Qin Zhang , Dongsheng An , Tianjun Xiao , Tong He , Qingming Tang , Ying Nian Wu , Joseph Tighe , Yifan Xing , Stefano Soatto

The expansion of machine learning into dynamic environments presents challenges in handling open-world problems where label shift, covariate shift, and unknown classes emerge. Post-training methods have been explored to address these…

Machine Learning · Computer Science 2025-08-26 Miru Kim , Mugon Joe , Minhae Kwon

Heterogeneous graph neural networks (HGNNs) have significantly propelled the information retrieval (IR) field. Still, the effectiveness of HGNNs heavily relies on high-quality labels, which are often expensive to acquire. This challenge has…

Machine Learning · Computer Science 2024-09-12 Siqing Li , Jin-Duk Park , Wei Huang , Xin Cao , Won-Yong Shin , Zhiqiang Xu

Open World Object Detection (OWOD) is a new and challenging computer vision task that bridges the gap between classic object detection (OD) benchmarks and object detection in the real world. In addition to detecting and classifying…

Computer Vision and Pattern Recognition · Computer Science 2022-12-06 Orr Zohar , Kuan-Chieh Wang , Serena Yeung

Open set recognition is designed to identify known classes and to reject unknown classes simultaneously. Specifically, identifying known classes and rejecting unknown classes correspond to reducing the empirical risk and the open space…

Computer Vision and Pattern Recognition · Computer Science 2021-08-10 Ziheng Xia , Penghui Wang , Ganggang Dong , Hongwei Liu

Traditional semi-supervised learning tasks assume that both labeled and unlabeled data follow the same class distribution, but the realistic open-world scenarios are of more complexity with unknown novel classes mixed in the unlabeled set.…

Computer Vision and Pattern Recognition · Computer Science 2023-05-23 Jiaming Liu , Yangqiming Wang , Tongze Zhang , Yulu Fan , Qinli Yang , Junming Shao

As the digital landscape becomes more interconnected, the frequency and severity of zero-day attacks, have significantly increased, leading to an urgent need for innovative Intrusion Detection Systems (IDS). Machine Learning-based IDS that…

Cryptography and Security · Computer Science 2025-05-15 Ippokratis Koukoulis , Ilias Syrigos , Thanasis Korakis

The escalating prevalence of encryption protocols has led to a concomitant surge in the number of malicious attacks that hide in encrypted traffic. Power grid systems, as fundamental infrastructure, are becoming prime targets for such…

Cryptography and Security · Computer Science 2024-08-21 Peng Zhou , Yongdong Liu , Lixun Ma , Weiye Zhang , Haohan Tan , Zhenguang Liu , Butian Huang

Open-world semi-supervised learning (Open-world SSL) for node classification, that classifies unlabeled nodes into seen classes or multiple novel classes, is a practical but under-explored problem in the graph community. As only seen…

Machine Learning · Computer Science 2024-03-19 Yanling Wang , Jing Zhang , Lingxi Zhang , Lixin Liu , Yuxiao Dong , Cuiping Li , Hong Chen , Hongzhi Yin