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Reconfigurable intelligent surface (RIS) is a disruptive technology to enhance the performance of physical-layer key generation (PKG) thanks to its ability to smartly customize the radio environments. Existing RIS-assisted PKG methods are…

Information Theory · Computer Science 2022-11-08 Lei Hu , Guyue Li , Xuewen Qian , Aiqun Hu , Derrick Wing Kwan Ng

Outsourcing encrypted data to the cloud creates a fundamental tension between data privacy and functional searchability. Current Searchable Symmetric Encryption (SSE) solutions frequently have significant limitations, such as excessive…

Cryptography and Security · Computer Science 2026-03-11 Seydina Ousmane Diallo , Maryline Laurent , Nesrine Kaaniche

Applying machine learning algorithms to private data, such as financial or medical data, while preserving their confidentiality, is a difficult task. Homomorphic Encryption (HE) is acknowledged for its ability to allow computation on…

Machine Learning · Computer Science 2020-06-16 Daniel Huynh

Substring-searchable symmetric encryption (substring-SSE) has become increasingly critical for privacy-preserving applications in cloud systems. However, existing schemes remain vulnerable to information leakage during search operations,…

Cryptography and Security · Computer Science 2025-11-04 Xijie Ba , Qin Liu , Xiaohong Li , Jianting Ning

Searchable symmetric encryption (SSE) enables a client to perform searches over its outsourced encrypted files while preserving privacy of the files and queries. Dynamic schemes, where files can be added or removed, leak more information…

Cryptography and Security · Computer Science 2017-10-03 Mohammad Etemad , Alptekin Küpçü , Charalampos Papamanthou , David Evans

In this article, we tackle for the first time the problem of dynamic memory-efficient Searchable Symmetric Encryption (SSE). In the term "memory-efficient" SSE, we encompass both the goals of local SSE, and page-efficient SSE. The…

Cryptography and Security · Computer Science 2022-01-14 Brice Minaud , Michael Reichle

With the proliferation of online social networking services and mobile smart devices equipped with mobile communications module and position sensor module, massive amount of multimedia data has been collected, stored and shared. This trend…

Multimedia · Computer Science 2018-08-30 Chengyuan Zhang , Yunwu Lin , Lei Zhu , Zuping Zhang , Yan Tang , Fang Huang

Privacy concerns in outsourced cloud databases have become more and more important recently and many efficient and scalable query processing methods over encrypted data have been proposed. However, there is very limited work on how to…

Cryptography and Security · Computer Science 2018-01-22 Xianrui Meng , Haohan Zhu , George Kollios

Due to increasing privacy concerns, neural network (NN) based secure inference (SI) schemes that simultaneously hide the client inputs and server models attract major research interests. While existing works focused on developing secure…

Cryptography and Security · Computer Science 2020-02-18 Song Bian , Weiwen Jiang , Qing Lu , Yiyu Shi , Takashi Sato

At present, the cloud storage used in searchable symmetric encryption schemes (SSE) is provided in a private way, which cannot be seen as a true cloud. Moreover, the cloud server is thought to be credible, because it always returns the…

Cryptography and Security · Computer Science 2017-11-21 Huige Li , Fangguo Zhang , Jiejie He , Haibo Tian

While the security of the cloud remains a concern, a common practice is to encrypt data before outsourcing them for utilization. One key challenging issue is how to efficiently perform queries over the ciphertext. Conventional crypto-based…

Cryptography and Security · Computer Science 2019-12-19 Yaxing Chen , Qinghua Zheng , Dan Liu , Zheng Yan , Wenhai Sun , Ning Zhang , Wenjing Lou , Y. Thomas Hou

Searchable encryption (SE) is one of the key enablers for building encrypted databases. It allows a cloud server to search over encrypted data without decryption. Dynamic SE additionally includes data addition and deletion operations to…

Cryptography and Security · Computer Science 2020-04-13 Viet Vo , Shangqi Lai , Xingliang Yuan , Shi-Feng Sun , Surya Nepal , Joseph K. Liu

Space-air-ground integrated networks (SAGIN) are one of the most promising advanced paradigms in the sixth generation (6G) communication. SAGIN can support high data rates, low latency, and seamless network coverage for interconnected…

Cryptography and Security · Computer Science 2022-08-18 Rakpong Kaewpuang , Minrui Xu , Dusit Niyato , Han Yu , Zehui Xiong

Geosocial reachability queries (\textsc{RangeReach}) determine whether a given vertex in a geosocial network can reach any spatial vertex within a query region. The state-of-the-art 3DReach method answers such queries by encoding graph…

Databases · Computer Science 2026-02-06 Rick van der Heijden , Nikolay Yakovets , Thekla Hamm

This paper presents a recursive secret sharing technique that distributes k-1 secrets of length b each into n shares such that each share is effectively of length (n/(k-1))*b and any k pieces suffice for reconstructing all the k-1 secrets.…

Cryptography and Security · Computer Science 2010-01-11 Abhishek Parakh , Subhash Kak

Both astronomy and biology are experiencing explosive growth of data, resulting in a "big data" problem that stands in the way of a "big data" opportunity for discovery. One common question asked of such data is that of approximate search…

Data Structures and Algorithms · Computer Science 2019-11-12 Najib Ishaq , George Student , Noah M. Daniels

Although spatial indexes shorten the query response time, they rely on complex tree structures to narrow down the search space. Such structures in turn yield additional storage overhead and take a toll on index maintenance. Recently, there…

Databases · Computer Science 2023-09-15 Congying Wang , Jia Yu , Zhuoyue Zhao

Kernel methods are powerful tools in machine learning. They have to be computationally efficient. In this paper, we present a novel Geometric-based approach to compute efficiently the string subsequence kernel (SSK). Our main idea is that…

Machine Learning · Computer Science 2015-03-02 Slimane Bellaouar , Hadda Cherroun , Djelloul Ziadi

With the widespread use of GPS-enabled mobile devices, an unprecedented amount of trajectory data is becoming available from various sources such as Bikely, GPS-wayPoints, and Uber. The rise of innovative transportation services and recent…

Searchable Encryption (SE) enables users to query outsourced encrypted data while preserving data confidentiality. However, most efficient schemes still leak the search pattern and access pattern, which may allow an honest-but-curious cloud…

Cryptography and Security · Computer Science 2026-04-10 Jing Zhang , Ganxuan Yang , Yifei Yang , Siqi Wen , Zhengyang Qiu