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Self-supervised learning (SSL) of speech has shown impressive results in speech-related tasks, particularly in automatic speech recognition (ASR). While most methods employ the output of intermediate layers of the SSL model as real-valued…

Sound · Computer Science 2023-05-30 Xuankai Chang , Brian Yan , Yuya Fujita , Takashi Maekaku , Shinji Watanabe

Today, many web advertising data flows involve passive cross-site tracking of users. Enabling such a mechanism through the usage of third party tracking cookies (3PC) exposes sensitive user data to a large number of parties, with little…

Cryptography and Security · Computer Science 2021-10-29 Joseph J. Pfeiffer , Denis Charles , Davis Gilton , Young Hun Jung , Mehul Parsana , Erik Anderson

Distributed learning, particularly variants of distributed stochastic gradient descent (DSGD), are widely employed to speed up training by leveraging computational resources of several workers. However, in practise, communication delay…

Machine Learning · Computer Science 2020-11-13 Kerem Ozfatura , Emre Ozfatura , Deniz Gunduz

Federated learning (FL) typically relies on synchronous training, which is slow due to stragglers. While asynchronous training handles stragglers efficiently, it does not ensure privacy due to the incompatibility with the secure aggregation…

Machine Learning · Computer Science 2022-02-03 Jinhyun So , Ramy E. Ali , Başak Güler , A. Salman Avestimehr

Secure aggregation enables a group of mutually distrustful parties, each holding private inputs, to collaboratively compute an aggregate value while preserving the privacy of their individual inputs. However, a major challenge in adopting…

Cryptography and Security · Computer Science 2025-04-14 Romain de Laage , Peterson Yuhala , François-Xavier Wicht , Pascal Felber , Christian Cachin , Valerio Schiavoni

The introduction of the new multi-user linearly-separable distributed computing framework, has recently revealed how a parallel treatment of users can yield large parallelization gains with relatively low computation and communication…

Information Theory · Computer Science 2026-04-22 Amir Masoud Jafarpisheh , Ali Khalesi , Petros Elia

With the growing concern about the security and privacy of smart grid systems, cyberattacks on critical power grid components, such as state estimation, have proven to be one of the top-priority cyber-related issues and have received…

Cryptography and Security · Computer Science 2023-04-10 Muhammad Akbar Husnoo , Adnan Anwar , Haftu Tasew Reda , Nasser Hosseinzadeh , Shama Naz Islam , Abdun Naser Mahmood , Robin Doss

Federated learning algorithms are developed both for efficiency reasons and to ensure the privacy and confidentiality of personal and business data, respectively. Despite no data being shared explicitly, recent studies showed that the…

Machine Learning · Computer Science 2023-05-26 Balázs Pejó , Gergely Biczók

Federated learning promises to make machine learning feasible on distributed, private datasets by implementing gradient descent using secure aggregation methods. The idea is to compute a global weight update without revealing the…

Machine Learning · Computer Science 2019-12-03 Badih Ghazi , Rasmus Pagh , Ameya Velingker

Secure aggregation (SA) is fundamental to privacy preservation in federated learning (FL), enabling model aggregation while preventing disclosure of individual user updates. This paper addresses hierarchical secure aggregation (HSA) against…

Information Theory · Computer Science 2025-11-26 Min Xu , Xuejiao Han , Kai Wan , Gennian Ge

Secure multi-party computation-based machine learning, referred to as MPL, has become an important technology to utilize data from multiple parties with privacy preservation. While MPL provides rigorous security guarantees for the…

Cryptography and Security · Computer Science 2022-08-19 Wenqiang Ruan , Mingxin Xu , Wenjing Fang , Li Wang , Lei Wang , Weili Han

Decentralized Federated Learning (DFL) enables collaborative model training without a central server, but it remains vulnerable to privacy leakage because shared model updates can expose sensitive information through inversion,…

Cryptography and Security · Computer Science 2025-12-09 Fardin Jalil Piran , Zhiling Chen , Yang Zhang , Qianyu Zhou , Jiong Tang , Farhad Imani

Secure aggregation is widely used in horizontal Federated Learning (FL), to prevent leakage of training data when model updates from data owners are aggregated. Secure aggregation protocols based on Homomorphic Encryption (HE) have been…

Cryptography and Security · Computer Science 2022-08-16 Zizhen Liu , Si Chen , Jing Ye , Junfeng Fan , Huawei Li , Xiaowei Li

Asynchronous federated learning (AFL) is an effective method to address the challenge of device heterogeneity in cross-device federated learning. However, AFL is usually incompatible with existing secure aggregation protocols used to…

Cryptography and Security · Computer Science 2024-06-07 Kun Wang , Yi-Rui Yang , Wu-Jun Li

Training high-performing deep learning models require a rich amount of data which is usually distributed among multiple data sources in practice. Simply centralizing these multi-sourced data for training would raise critical security and…

Cryptography and Security · Computer Science 2021-10-27 Yansong Gao , Qun Li , Yifeng Zheng , Guohong Wang , Jiannan Wei , Mang Su

In this paper, we study the fundamental limits of hierarchical secure aggregation under unreliable communication. We consider a hierarchical network where each client connects to multiple relays, and both client-to-relay and relay-to-server…

Distributed, Parallel, and Cluster Computing · Computer Science 2026-01-21 Shudi Weng , Xiang Zhang , Yizhou Zhao , Giuseppe Caire , Ming Xiao , Mikael Skoglund

As collaborative learning allows joint training of a model using multiple sources of data, the security problem has been a central concern. Malicious users can upload poisoned data to prevent the model's convergence or inject hidden…

Cryptography and Security · Computer Science 2021-01-21 Ximing Qiao , Yuhua Bai , Siping Hu , Ang Li , Yiran Chen , Hai Li

Decentralized Federated Learning (DFL) has garnered attention for its robustness and scalability compared to Centralized Federated Learning (CFL). While DFL is commonly believed to offer privacy advantages due to the decentralized control…

Cryptography and Security · Computer Science 2024-09-24 Changlong Ji , Stephane Maag , Richard Heusdens , Qiongxiu Li

The use of DNS over HTTPS (DoH) tunneling by an attacker to hide malicious activity within encrypted DNS traffic poses a serious threat to network security, as it allows malicious actors to bypass traditional monitoring and intrusion…

Federated learning (FL) enables training of a global model while keeping raw data on end-devices. Despite this, FL has shown to leak private user information and thus in practice, it is often coupled with methods such as differential…

Machine Learning · Computer Science 2026-04-23 Jie Xu , Haaris Mehmood , Rogier Van Dalen , Karthikeyan Saravanan , Mete Ozay