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The distributed denial-of-service (DDoS) attack stands out as a highly formidable cyber threat, representing an advanced form of the denial-of-service (DoS) attack. A DDoS attack involves multiple computers working together to overwhelm a…

Cryptography and Security · Computer Science 2025-03-10 Nizo Jaman Shohan , Gazi Tanbhir , Faria Elahi , Ahsan Ullah , Md. Nazmus Sakib

For the traditional denial-of-service attack detection methods have complex algorithms and high computational overhead, which are difficult to meet the demand of online detection; and the experimental environment is mostly a simulation…

Cryptography and Security · Computer Science 2022-06-02 Yu Fu , Xueyuan Duan , Kun Wang , Bin Li

In recent years, DNS over Encrypted (DoE) methods have been regarded as a novel trend within the realm of the DNS ecosystem. In these DoE methods, DNS over HTTPS (DoH) provides encryption to protect data confidentiality while providing…

Cryptography and Security · Computer Science 2024-03-20 Cong Dong , Jiahai Yang , Yun Li , Yue Wu , Yufan Chen , Chenglong Li , Haoran Jiao , Xia Yin , Yuling Liu

To maintain the privacy of users' web browsing history, popular browsers encrypt their DNS traffic using the DNS-over-HTTPS (DoH) protocol. Unfortunately, encrypting DNS packets prevents many existing intrusion detection systems from using…

Cryptography and Security · Computer Science 2023-10-18 Sergio Salinas Monroy , Aman Kumar Gupta , Garrett Wahlstedt

Distributed denial of service(DDos) attack is ongoing dangerous threat to the Internet. Commonly, DDos attacks are carried out at the network layer, e.g. SYN flooding, ICMP flooding and UDP flooding, which are called Distributed denial of…

Networking and Internet Architecture · Computer Science 2014-02-11 Prajwal R Thakare , K. Hanumantha Rao

Distributed Denial-of-Service (DDoS) attacks are usually launched through the $botnet$, an "army" of compromised nodes hidden in the network. Inferential tools for DDoS mitigation should accordingly enable an early and reliable…

Information Theory · Computer Science 2016-09-12 Vincenzo Matta , Mario Di Mauro , Maurizio Longo

Anomaly detection is a crucial step for preventing malicious activities in the network and keeping resources available all the time for legitimate users. It is noticed from various studies that classical anomaly detectors work well with…

Cryptography and Security · Computer Science 2020-02-17 Awais Ahmed , Sufian Hameed , Muhammad Rafi , Qublai Khan Ali Mirza

The purpose of this project is to assess how well defenders can detect DNS-over-HTTPS (DoH) file exfiltration, and which evasion strategies can be used by attackers. While providing a reproducible toolkit to generate, intercept and analyze…

Cryptography and Security · Computer Science 2025-12-24 Adam Elaoumari

Existing distributed denial-of-service attack detection in software defined networks (SDNs) typically perform detection in a single domain. In reality, abnormal traffic usually affects multiple network domains. Thus, a cross-domain attack…

Networking and Internet Architecture · Computer Science 2018-09-20 Liehuang Zhu , Xiangyun Tang , Meng Shen , Xiaojiang Du , Mohsen Guizani

Distributed denial of service (DDoS) attack becomes a rapidly growing problem with the fast development of the Internet. The existing DDoS attack detection methods have time-delay and low detection rate. This paper presents a DDoS attack…

Cryptography and Security · Computer Science 2019-03-29 Jing Chen , Xiangyan Tang , Jieren Cheng , Fengkai Wang , Ruomeng Xu

Domain name system (DNS) is a crucial part of the Internet, yet has been widely exploited by cyber attackers. Apart from making static methods like blacklists or sinkholes infeasible, some weasel attackers can even bypass detection systems…

Cryptography and Security · Computer Science 2019-09-05 Xiaoqing Sun , Mingkai Tong , Jiahai Yang

Cloud environments face frequent DDoS threats due to centralized resources and broad attack surfaces. Modern cloud-native DDoS attacks further evolve rapidly and often blend multi-vector strategies, creating an operational dilemma:…

Cryptography and Security · Computer Science 2026-01-22 Haodong Chen , Ziheng Zhang , Jinghui Jiang , Qiang Su , Qiao Xiang

In this paper, we give efficient algorithms and lower bounds for solving the heavy hitters problem while preserving differential privacy in the fully distributed local model. In this model, there are n parties, each of which possesses a…

Data Structures and Algorithms · Computer Science 2018-03-16 Justin Hsu , Sanjeev Khanna , Aaron Roth

Detecting Domain Name System (DNS) tunneling is a significant challenge in security due to its capacity to hide harmful actions within DNS traffic that appears to be normal and legitimate. Traditional detection methods are based on…

Cryptography and Security · Computer Science 2025-07-15 Novruz Amirov , Baran Isik , Bilal Ihsan Tuncer , Serif Bahtiyar

Denial of service (DoS) attacks and more particularly the distributed ones (DDoS) are one of the latest threat and pose a grave danger to users, organizations and infrastructures of the Internet. Several schemes have been proposed on how to…

Cryptography and Security · Computer Science 2012-04-26 B. B. Gupta , R. C. Joshi , Manoj Misra

Distributed Denial-of-Service (DDoS) attacks represent a persistent threat to modern telecommunications networks: detecting and counteracting them is still a crucial unresolved challenge for network operators. DDoS attack detection is…

Networking and Internet Architecture · Computer Science 2021-11-05 Damu Ding , Marco Savi , Domenico Siracusa

DDoS attacks, also known as distributed denial of service (DDoS) attacks, have emerged as one of the most serious and fastest-growing threats on the Internet. Denial-of-service (DDoS) attacks are an example of cyber attacks that target a…

Cryptography and Security · Computer Science 2022-04-28 Anupama Mishra

Distributed Denial of Service (DDOS) attack is one of the most common network attacks. DDoS attacks are becoming more and more diverse, which makes it difficult for some DDoS attack detection methods based on single network flow…

Cryptography and Security · Computer Science 2019-03-20 Li Yijie , Zhai Shang , Chen Mingrui

Detecting Denial of Service (DoS) and Distributed Denial of Service (DDoS) attacks remains a critical challenge in cybersecurity. This research introduces a hybrid deep learning model combining Gated Recurrent Units (GRUs) and a Neural…

Cryptography and Security · Computer Science 2025-04-11 Caroline Panggabean , Chandrasekar Venkatachalam , Priyanka Shah , Sincy John , Renuka Devi P , Shanmugavalli Venkatachalam

In this work, we study practical heuristics to improve the performance of prefix-tree based algorithms for differentially private heavy hitter detection. Our model assumes each user has multiple data points and the goal is to learn as many…

Machine Learning · Computer Science 2023-07-24 Karan Chadha , Junye Chen , John Duchi , Vitaly Feldman , Hanieh Hashemi , Omid Javidbakht , Audra McMillan , Kunal Talwar