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We propose a novel method for imputing missing data by adapting the well-known Generative Adversarial Nets (GAN) framework. Accordingly, we call our method Generative Adversarial Imputation Nets (GAIN). The generator (G) observes some…

Machine Learning · Computer Science 2018-06-11 Jinsung Yoon , James Jordon , Mihaela van der Schaar

As online systems based on machine learning are offered to public or paid subscribers via application programming interfaces (APIs), they become vulnerable to frequent exploits and attacks. This paper studies adversarial machine learning in…

Machine Learning · Computer Science 2019-01-29 Yi Shi , Yalin E. Sagduyu , Kemal Davaslioglu , Jason H. Li

Recent years have witnessed a rise in the frequency and intensity of cyberattacks targeted at critical infrastructure systems. This study designs a versatile, data-driven cyberattack detection platform for infrastructure systems…

Cryptography and Security · Computer Science 2018-06-01 Sarin E. Chandy , Amin Rasekh , Zachary A. Barker , M. Ehsan Shafiee

Recommender systems are popular tools for information retrieval tasks on a large variety of web applications and personalized products. In this work, we propose a Generative Adversarial Network based recommendation framework using a…

Information Retrieval · Computer Science 2020-12-15 Yao Zhou , Jianpeng Xu , Jun Wu , Zeinab Taghavi Nasrabadi , Evren Korpeoglu , Kannan Achan , Jingrui He

We present a systematic study of provider-side data poisoning in retrieval-augmented recommender systems (RAG-based). By modifying only a small fraction of tokens within item descriptions -- for instance, adding emotional keywords or…

Information Retrieval · Computer Science 2025-05-09 Fatemeh Nazary , Yashar Deldjoo , Tommaso Di Noia , Eugenio Di Sciascio

The published method Generative Adversarial Networks for Recommender Systems (GANRS) allows generating data sets for collaborative filtering recommendation systems. The GANRS source code is available along with a representative set of…

Information Retrieval · Computer Science 2024-10-28 Jesús Bobadilla , Abraham Gutiérrez

Malware detectors based on machine learning are vulnerable to adversarial attacks. Generative Adversarial Networks (GAN) are architectures based on Neural Networks that could produce successful adversarial samples. The interest towards this…

Cryptography and Security · Computer Science 2021-09-29 Renjith G , Sonia Laudanna , Aji S , Corrado Aaron Visaggio , Vinod P

With the growing deployment of sequential recommender systems in e-commerce and other fields, their black-box interfaces raise security concerns: models are vulnerable to extraction and subsequent adversarial manipulation. Existing…

Information Retrieval · Computer Science 2026-02-13 Hongyue Zhang , Mingming Li , Dongqin Liu , Hui Wang , Yaning Zhang , Xi Zhou , Honglei Lv , Jiao Dai , Jizhong Han

Sequential Recommenders, which exploit dynamic user intents through interaction sequences, is vulnerable to adversarial attacks. While existing attacks primarily rely on data poisoning, they require large-scale user access or fake profiles…

Machine Learning · Computer Science 2025-12-23 Jiajie Su , Zihan Nan , Yunshan Ma , Xiaobo Xia , Xiaohua Feng , Weiming Liu , Xiang Chen , Xiaolin Zheng , Chaochao Chen

As an essential tool in security, the intrusion detection system bears the responsibility of the defense to network attacks performed by malicious traffic. Nowadays, with the help of machine learning algorithms, intrusion detection systems…

Cryptography and Security · Computer Science 2022-05-11 Zilong Lin , Yong Shi , Zhi Xue

While the benefits of 6G-enabled Internet of Things (IoT) are numerous, providing high-speed, low-latency communication that brings new opportunities for innovation and forms the foundation for continued growth in the IoT industry, it is…

Cryptography and Security · Computer Science 2023-04-13 Mohamed Amine Ferrag , Djallel Hamouda , Merouane Debbah , Leandros Maglaras , Abderrahmane Lakas

Product recommendation can be considered as a problem in data fusion-- estimation of the joint distribution between individuals, their behaviors, and goods or services of interest. This work proposes a conditional, coupled generative…

Information Retrieval · Computer Science 2020-09-02 Joel R. Bock , Akhilesh Maewal

Recently, recommender systems have achieved promising performances and become one of the most widely used web applications. However, recommender systems are often trained on highly sensitive user data, thus potential data leakage from…

Cryptography and Security · Computer Science 2021-09-17 Minxing Zhang , Zhaochun Ren , Zihan Wang , Pengjie Ren , Zhumin Chen , Pengfei Hu , Yang Zhang

Generative models are undoubtedly a hot topic in Artificial Intelligence, among which the most common type is Generative Adversarial Networks (GANs). These architectures let one synthesise artificial datasets by implicitly modelling the…

Machine Learning · Computer Science 2020-07-07 Francisco J. Ibarrola , Nishant Ravikumar , Alejandro F. Frangi

Most of the recent studies of social recommendation assume that people share similar preferences with their friends and the online social relations are helpful in improving traditional recommender systems. However, this assumption is often…

Information Retrieval · Computer Science 2020-04-07 Junliang Yu , Min Gao , Hongzhi Yin , Jundong Li , Chongming Gao , Qinyong Wang

Recommender systems have become an integral part of online services to help users locate specific information in a sea of data. However, existing studies show that some recommender systems are vulnerable to poisoning attacks, particularly…

Cryptography and Security · Computer Science 2024-04-24 Thanh Toan Nguyen , Quoc Viet Hung Nguyen , Thanh Tam Nguyen , Thanh Trung Huynh , Thanh Thi Nguyen , Matthias Weidlich , Hongzhi Yin

While sequential recommender systems achieve significant improvements on capturing user dynamics, we argue that sequential recommenders are vulnerable against substitution-based profile pollution attacks. To demonstrate our hypothesis, we…

Information Retrieval · Computer Science 2022-07-25 Zhenrui Yue , Huimin Zeng , Ziyi Kou , Lanyu Shang , Dong Wang

Machine learning methods to aid defence systems in detecting malicious activity typically rely on labelled data. In some domains, such labelled data is unavailable or incomplete. In practice this can lead to low detection rates and high…

Machine Learning · Computer Science 2023-07-27 Ricardo Ribeiro Pereira , Jacopo Bono , João Tiago Ascensão , David Aparício , Pedro Ribeiro , Pedro Bizarro

Recreating cyber-attack alert data with a high level of fidelity is challenging due to the intricate interaction between features, non-homogeneity of alerts, and potential for rare yet critical samples. Generative Adversarial Networks…

Machine Learning · Computer Science 2019-08-06 Christopher Sweet , Stephen Moskal , Shanchieh Jay Yang

Online reviews have become a vital source of information in purchasing a service (product). Opinion spammers manipulate reviews, affecting the overall perception of the service. A key challenge in detecting opinion spam is obtaining ground…

Machine Learning · Computer Science 2019-05-24 Gray Stanton , Athirai A. Irissappane