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Friend-to-friend (F2F) overlays, which restrict direct communication to mutually trusted parties, are a promising substrate for privacy-preserving communication due to their inherent membership-concealment and Sybil-resistance. Yet,…

Cryptography and Security · Computer Science 2016-01-25 Stefanie Roos , Martin Beck , Thorsten Strufe

Building on the adoption of the Network Functions Virtualization (NFV) and Software Defined Networking (SDN) paradigms, 5G networks promise distinctive features includ- ing the capability to support multi-tenancy. Virtual network operators…

Networking and Internet Architecture · Computer Science 2016-12-22 Konstantinos V. Katsaros , Vasilis Glykantzis , George Petropoulos

Hidden geometry enables the investigation of complex networks at different scales. Extending this framework to multiplex networks, we uncover a novel kind of mesoscopic organization in real multiplex systems, named $\textit{clan}$, a group…

Physics and Society · Physics 2024-02-07 Gangmin Son , Meesoon Ha , Hawoong Jeong

The central building block of secure and privacy-preserving Vehicular Communication (VC) systems is a Vehicular Public-Key Infrastructure (VPKI), which provides vehicles with multiple anonymized credentials, termed pseudonyms. These…

Cryptography and Security · Computer Science 2018-07-10 Hamid Noroozi , Mohammad Khodaei , Panos Papadimitratos

In today's enterprise environment, traditional access methods such as Virtual Private Networks (VPNs) and application-specific Single Sign-On (SSO) often fall short when it comes to securely scaling access for a distributed and dynamic…

Cryptography and Security · Computer Science 2025-08-05 Sanjay Singh , Mitendra Mahto

Hierarchical tree structures are common in many real-world systems, from tree roots and branches to neuronal dendrites and biologically inspired artificial neural networks, as well as in technological networks for organizing and searching…

Statistical Mechanics · Physics 2025-02-04 Davide Cipollini , Lambert Schomaker

Verifiable Secret-Sharing (VSS) is a fundamental primitive in secure distributed computing. It is used as a building block in several distributed computing tasks, such as Byzantine agreement and secure multi-party computation. In this…

Cryptography and Security · Computer Science 2022-02-07 Anirudh Chandramouli , Ashish Choudhury , Arpita Patra

This paper presents elements that form the structure of a network of data using secure stable and mature technologies that meet the requirement of having code free. The principle would be conflicting code open Tuesday where he wants to keep…

Cryptography and Security · Computer Science 2008-05-29 Luciana Guimaraes

The VPN Tree Routing Conjecture is a conjecture about the Virtual Private Network Design problem. It states that the symmetric version of the problem always has an optimum solution which has a tree-like structure. In recent work, Hurkens,…

Optimization and Control · Mathematics 2008-11-24 Samuel Fiorini , Gianpaolo Oriolo , Laura Sanità , Dirk Oliver Theis

One of the fundamental problems in network virtualization is Virtual Network Embedding (VNE). The VNE problem deals with finding an effective mapping of the virtual nodes & links onto the substrate network. The recent advances in network…

Networking and Internet Architecture · Computer Science 2016-02-09 Luís Ferrolho , Max Alaluna , Nuno Neves , Fernando M. V. Ramos

The proliferation of distributed energy resources (DERs) and demand-side flexibility has made virtual power plants (VPPs) central to modern grid operation. Yet their end-to-end business pipeline, covering bidding, dispatch, metering,…

Systems and Control · Electrical Eng. & Systems 2025-10-20 Ziqing Zhu

As power systems advance toward net-zero targets, behind-the-meter renewables are driving rapid growth in distributed energy resources (DERs). Virtual power plants (VPPs) increasingly coordinate these resources to support power distribution…

Systems and Control · Electrical Eng. & Systems 2026-04-07 Chenghao Huang , Jiarong Fan , Weiqing Wang , Hao Wang

Tree-based models are among the most efficient machine learning techniques for data mining nowadays due to their accuracy, interpretability, and simplicity. The recent orthogonal needs for more data and privacy protection call for…

Cryptography and Security · Computer Science 2021-06-21 Sylvain Chatel , Apostolos Pyrgelis , Juan Ramon Troncoso-Pastoriza , Jean-Pierre Hubaux

Internet users increasingly rely on commercial virtual private network (VPN) services to protect their security and privacy. The VPN services route the client's traffic over an encrypted tunnel to a VPN gateway in the cloud. Thus, they hide…

Cryptography and Security · Computer Science 2019-12-11 Thanh Bui , Siddharth Prakash Rao , Markku Antikainen , Tuomas Aura

The central building block of secure and privacy-preserving Vehicular Communication (VC) systems is a Vehicular Public-Key Infrastructure (VPKI), which provides vehicles with multiple anonymized credentials, termed pseudonyms. These…

Cryptography and Security · Computer Science 2019-05-23 Mohammad Khodaei , Hamid Noroozi , Panos Papadimitratos

Due to privacy concerns, multi-party gradient tree boosting algorithms have become widely popular amongst machine learning researchers and practitioners. However, limited existing works have focused on vertically partitioned datasets, and…

Cryptography and Security · Computer Science 2022-02-08 Kennedy Edemacu , Beakcheol Jang , Jong Wook Kim

Federated learning (FL) is an emerging paradigm that enables multiple organizations to jointly train a model without revealing their private data to each other. This paper studies {\it vertical} federated learning, which tackles the…

Cryptography and Security · Computer Science 2020-08-17 Yuncheng Wu , Shaofeng Cai , Xiaokui Xiao , Gang Chen , Beng Chin Ooi

Registration and management of users in a large scale Grid computing environment presents new challenges that are not well addressed by existing protocols. Within a single Virtual Organization (VO), thousands of users will potentially need…

Distributed, Parallel, and Cluster Computing · Computer Science 2007-05-23 Richard Baker , Dantong Yu , Tomasz Wlodek

Private Information Retrieval (PIR) is a fundamental cryptographic primitive that enables users to retrieve data from a database without revealing which item is being accessed, thereby preserving query privacy. However, PIR protocols also…

Cryptography and Security · Computer Science 2025-09-18 Lin Zhu , Lingwei Kong , Xin Ning , Xiaoyang Qu , Jianzong Wang

Vertical federated learning (VFL) attracts increasing attention due to the emerging demands of multi-party collaborative modeling and concerns of privacy leakage. A complete list of metrics to evaluate VFL algorithms should include model…

Machine Learning · Computer Science 2022-03-22 Qingsong Zhang , Bin Gu , Zhiyuan Dang , Cheng Deng , Heng Huang