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A federated sleep staging method based on adaptive re-aggregation and double prototype-contrastive using single-channel electroencephalogram

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Engineering Applications of Artificial Intelligence 2025年 156卷

作者： Bian Ma Lijuan Duan Zhaoyang Huang Yuanhua Qiao College of Computer Science Beijing University of Technology Beijing 100124 China Beijing Key Laboratory of Trusted Computing Beijing 100124 China China National Engineering Laboratory for Critical Technologies of Information Security Classified Protection Beijing 100124 China Department of Neurology Xuanwu Hospital Capital Medical University Beijing 100053 China Beijing Key Laboratory of Neuromodulation Beijing 100053 China School of Mathematics Statistics and Mechanics Beijing University of Technology Beijing 100124 China

The limited availability of sleep data collected by individual institutions poses a significant challenge in developing automatic sleep staging models, especially given that most existing models rely heavily on data-driven approaches. The advent of federated learning has introduced an innovative and reliable paradigm for inter-institutional collaboration, facilitating task knowledge sharing and implicit data augmentation while preserving privacy. However, in traditional federated learning methodologies, local models are typically initialized with the global model at the onset of each iteration. This global-knowledge-centric approach often results in catastrophic forgetting during local training and inadequately adapts to the diversity of local data, compromising the overall generalization performance of the model. In this paper, we introduce a novel re-aggregation strategy for local model initialization that synergizes the global model with historical local models, thereby mitigating the undue influence of global knowledge and preserving local task-specific information. The re-aggregation weights are adaptively determined based on the confidence of the global and historical models on local datasets. Furthermore, to address the inherent ambiguity among sleep stages, a dual prototype-contrastive learning module is proposed, comprising Prototype-Consistency Contrastive (PCC) and Prototype-Distinguishability Contrastive (PDC) components. Specifically, the PCC component is designed to ensure consistency between local prototypes and unbiased prototypes derived from re-aggregation, enhancing intra-class knowledge coherence. The goal of the PDC component is to strengthen the discriminability among various sleep stages, improving inter-class differentiation. Comprehensive experiments conducted on two public datasets demonstrate the effectiveness, superiority, and flexibility of the proposed method.

关键词： Federated learning

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A Fair and Efficient Protocol for the Millionaires＇ Problem

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电子学报(英文版) 2009年第2期18卷 249-254页

作者： LI Ronghua WU Chuankun ZHANG Yuqing Graduate University of Chinese Academy of Sciences ( GUCAS) Beijing 100039 China National Computer Network Intrusion Protection Center GUCAS Beijing 100039 China State Key Laboratory of Information Security Institute of Software Beijing 100039 China

In the semi-honest model, Lin and Tzeng proposed an efficient solution to the millionaires' problem based on homomorphic encryption. They reduced the problem to the set intersection problem by encoding the private inputs in a special way (the encoding method allows an efficient protocol for the set intersection problem). This paper modifies Lin and Tzeng's protocol by introducing an Oblivious third party, and the modification is fair and secure in the same model. Compared with some of the previous fair protocols, our protocol relaxes the cryptographic assumption or the trust model. Compared with other previous fair protocols, our protocol are more efficient. We also consider security against malicious adversaries, i.e., malicious participants (the two millionaires) and third party.

关键词：议定书有效率编码方法第三方协议加密交集修改

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A New Triage Process Model for Digital Investigations

A New Triage Process Model for Digital Investigations

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2016 IEEE Advanced Information Management,Communicates,Electronic and Automation Control Conference(IMCEC 2016)

作者： Bo Yang Ning Li Jianguo Jiang Institute of Information Engineering Chinese Academy of Sciences Beijing Key Laboratory of Network Security Technology

ISBN: (纸本)9781509001668

As the amount of crimes involving the digital dimension grows,an ever increasing number of digital artifacts collected from a forensic investigation needs plenty of resources to process in a forensically sound *** forensic triage provides a way to deal with this scalability problem,as it is tailored to maximize the utilization of resources based on a priority ***,the paucity of definite solutions limits efforts to triage *** this article,we propose a Dual-Triage Digital Forensic Process Model,termed DTDFPM,which increases the effectiveness and efficiency of *** DTDFPM simultaneously enjoys the following properties: i) background information is utilized to prioritize cases and specific features are determined which media contain information relevant to the investigation,ii) a Priority Sorting with ArtificialNeuron algorithm(PSAN) is designed,which is the first application of neural network to sorting solution in digital triage,iii) efficient integration,the proposed model implemented based on the Python programming language can be easy to integrate into existing forensic *** theoretical analysis and performance evaluation indicate the advantage of our proposed process model.

关键词： Digital forensics digital triage process model case study

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Threshold quantum secret sharing between multi-party and multi-party

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Science China(Physics,Mechanics & Astronomy) 2008年第9期51卷 1308-1315页

作者： YANG YuGuang1,2,3 & WEN QiaoYan4 1 College of Computer Science and technology,beijing University of technology,beijing 100124,China 2 State key laboratory of Integrated Services network,Xidian University,Xi’an 710071,China 3 State key laboratory of Information security (Graduate University of Chinese Academy of Sciences),beijing 100049,China 4 State key laboratory of networking and Switching technology,beijing University of Posts and Tele-communications,beijing 100876,China College of Computer Science and Technology Beijing University of Technology Beijing 100124 China State Key Laboratory of Integrated Services Network Xidian University Xi’an 710071 China State Key Laboratory of Information Security (Graduate University of Chinese Academy of Sciences) Beijing 100049 China State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing 100876 China

A threshold quantum secret sharing (TQSS) scheme between multi-party and multi-party was proposed using a sequence of single photons,which is useful and efficient when the parties of communication are not all present. We described the process of this TQSS scheme and discussed its security. It was shown that entan-glement is not necessary for quantum secret sharing. Moreover,the theoretic effi-ciency was improved to approach 100% as almost all the instances can be used for generating the private key,and each photon can carry one bit of information. This protocol is feasible with the present-day technique.

关键词： threshold quantum secret sharing quantum cryptography single photon multi-party and multi-party

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Quantum threshold group signature

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Science China(Physics,Mechanics & Astronomy) 2008年第10期51卷 1505-1514页

作者： YANG YuGuang1,2,3 & WEN QiaoYan4 1 College of Computer Science and technology, beijing University of technology, beijing 100124, China 2 State key laboratory of Integrated Services network, Xidian University, Xi’an 710071, China 3 State key laboratory of Information security (Graduate University of Chinese Academy of Sciences), beijing 100049, China 4 State key laboratory of networking and Switching technology, beijing University of Posts and Tele-communications, beijing 100876, China College of Computer Science and Technology Beijing University of Technology Beijing 100124 China State Key Laboratory of Integrated Services Network Xidian University Xi’an 710071 China State Key Laboratory of Information Security Graduate University of Chinese Academy of Sciences Beijing 100049 China State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing 100876 China

In most situations, the signer is generally a single person. However, when the message is written on behalf of an organization, a valid message may require the approval or consent of several persons. Threshold signature is a solution to this problem. Generally speaking, as an authority which can be trusted by all members does not exist, a threshold signature scheme without a trusted party appears more attractive. Following some ideas of the classical Shamir’s threshold signature scheme, a quantum threshold group signature one is proposed. In the proposed scheme, only t or more of n persons in the group can generate the group signature and any t-1 or fewer ones cannot do that. In the verification phase, any t or more of n signature receivers can verify the message and any t-1 or fewer receivers cannot verify the validity of the signature.

关键词： threshold quantum signature trusted party quantum cryptography

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Efficient quantum state transmission via perfect quantum network coding

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Science China(Information Sciences) 2019年第1期62卷 191-204页

作者： Zhen-Zhen LI Gang XU Xiu-Bo CHEN Zhiguo QU Xin-Xin NIU Yi-Xian YANG Information Security Center State Key Laboratory of Networking and Switching TechnologyBeijing University of Posts and Telecommunications Guizhou Provincial Key Laboratory of Public Big Data Guizhou University Jiangsu Engineering Center of Network Monitoring Nanjing University of Information Science and Technology

Quantum network coding with the assistance of auxiliary resources can achieve perfect transmission of the quantum state. This paper suggests a novel perfect network coding scheme to efficiently solve the quantum k-pair problem, in which only a few assisting resources are introduced. Specifically, only one pair of maximally entangled state needs to be pre-shared between two intermediate nodes, and only O(k) of classical information is transmitted though the network. Moreover, the classical communication used in our protocol does not cause transmission congestion, providing better adaptability to large-scale quantum k-pair *** relevant analyses and comparisons, we demonstrate that our proposed scheme saves resources and has good application value, thereby showing its high efficiency. Furthermore, the proposed scheme achieves 1-max flow quantum communication, and the achievable rate region result is extended from its counterpart over the butterfly network.

关键词： perfect quantum network coding quantum k-pair problem efficient quantum state transmission communication efficiency achievable rate region

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A Digital Interface-based Digital Rights Management Scheme for Digital Cinema

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电子学报(英文版) 2010年第3期19卷 481-485页

作者： FAN Kefeng MA Zhaofeng YANG Yixiani NIU Xinxin Information Security Center State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing China National Engineering Laboratory for Disaster Backup and Recovery Beijing University of Posts and Telecommunications Beijing China Key Laboratory of Network and Information Attack and Defence Technology of MOE Beijing University of Posts and Telecommunications Beijing China

Digital rights management (DRM) is indispensable to prevent various kinds of illegal content usage. In this paper, we present a Digital interface-based DRM scheme (DI-DRM) for digital cinema, which can provide a new multi-interfaces oriented DRM solution for dig- . ital cinema. The authentication protocol and the encryption algorithm are described in detail. The two kinds of digital interfaces-based DRM prototype system are developed. security and performance analysis show the proposed scheme has several advantages. First, it is more secure than the existing scheme. Second, it is supported more rights, including the downstream devices. Finally, the cost of the chip based on DI-DRM is low. The scale of SOC application scheme is only 1/3 to 1/6 of the existing DTCP.

关键词：数字版权管理数字接口数字影院身份验证协议 DRM 数字电影加密算法原型系统

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An attack graph based network security evaluation model for hierarchical network

An attack graph based network security evaluation model for ...

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2010 IEEE International Conference on Information Theory and Information security, ICITIS 2010

作者： Ge, Haihui Gu, Lize Yang, Yixian Liu, Kewei Key Laboratory of Network and Information Attack and Defence Technology MOE Beijing University of Posts and Telecommunications Beijing China Laboratory of network security Information Technology Security Evaluation Center Beijing China

ISBN: (纸本)9781424469406

To evaluate the security situation of hierarchical network, a novel evaluation algorithm based on the method of constructing a security risk function is proposed. The proposed algorithm is the aggregation of qualitative evaluation and quantitative evaluation. We quantify the asset loss (AL) and the threat value of each attack step (TVA) basing on attack graph, and adjust the loss of assets that are of the same type and have different uses with coefficient of asset importance (CAI). Then, we construct a risk evaluation function which is based on the above three parameters. Thus, the assessment score gotten through the evaluation function can comprehensively reflect the risk value including loss, threat of an attack step, and importance of the suffering entity. Finally, we get the risk value by fusing all subnets'risk value in one area, and divide the risk value into 4 security levels. Seen from the case study, the model solves the security evaluation problem for hierarchical network simply and efficiently. © 2010 IEEE.

关键词： network security

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Constructing benchmarks for supporting explainable evaluations of static application security testing tools 13

Constructing benchmarks for supporting explainable evaluatio...

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13th International Symposium on Theoretical Aspects of Software Engineering, TASE 2019

作者： Hao, Gaojian Li, Feng Huo, Wei Sun, Qing Wang, Wei Li, Xinhua Zou, Wei Institute of Information Engineering Chinese Academy of Sciences China Key Laboratory of Network Assessment Technology Chinese Academy of Sciences Beijing Key Laboratory of Network Security and Protection Technology China School of Cyber Security University of Chinese Academy of Sciences China

ISBN: (纸本)9781728133423

When evaluating Static Application security Testing (SAST) tools, benchmarks based on real-world softwares are considered more representative than synthetic micro benchmarks. Generated from real-world software, the test cases in such kind of benchmarks usually contain multiple syntactic features which affect the vulnerability detection results reflecting SAST tools' capabilities in real-world settings. However, most existing benchmarks based on real-world software pay little attention to these syntactic features so that only limited information about the capabilities of SAST tools can be obtained from the evaluation results. In this paper, we provide a method of constructing benchmarks and evaluating SAST tools, which leverages the syntactic features to support the evaluation to be more explainable. To demonstrate the effectiveness, we applied our method to the benchmark built by Misha Zitser et al., generated 10 groups of test cases, and evaluated 2 SAST tools with them. The result shows that, with the benchmark constructed by our method, the evaluation could be more explainable which helps us to gain more information about the SAST tools' capabilities of vulnerability detection. © 2019 IEEE.

关键词： Software testing

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Performance analysis of sign quantized projection

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The Journal of China Universities of Posts and Telecommunications 2010年第1期17卷 62-66页

作者： YE Tian-yu NIU Xin-xin MA Zhao-feng YANG Yi-xian Information Security Center State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing 100876 China Key Laboratory of Network and Information Attack and Defense Technology of MOE Beijing University of Posts and Telecommunications Beijing 100876 China National Engineering Laboratory for Disaster Backup and Recovery Beijing 100876 China

Quantized projection technology （QP） is the version of quantization index modulation （QIM） working in the projection domain. It essentially belongs to a double-sided additive embedder. In this article, the concept of sign quantized projection （SQP） is proposed, which differs from the conventional QP when working as a single-sided embedder. Theoretical analysis reveals that SQP has the same probability of miss and probability of false alarm as QP. Also, the document-to-watermark ratio （DWR） of SQP is less than its counterpart of QP by lOlg（1＋ γ） dB.

关键词： DWR QP SQP

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