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Quantum-Enhanced Blockchain: A Secure and Practical Blockchain Scheme

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Computers, Materials & Continua 2023年第7期76卷 259-277页

作者： Ang liu Xiu-Bo Chen gang Xu Zhuo Wang Xuefen Feng Huamin Feng Information Security Center State Key Laboratory of Networking and Switching TechnologyBeijing University of Posts and TelecommunicationsBeijing100876China Network and Information Management Division Beijing Electronic Science and Technology InstituteBeijing100070China school of Information Science and Technology North China University of TechnologyBeijing100144China school of Artificial Intelligence Beijing University of Posts TelecommunicationsBeijing100876China Mathematics Teaching and Research Center Beijing Fengtai Yihai High SchoolBeijing100070China General Office Beijing Electronic Science and Technology InstituteBeijing100070China

The rapid advancement of quantum technology poses significant security risks to blockchain ***,quantum technology can also provide solutions for enhancing blockchain *** this paper,we propose a quantum-enhanced blockchain scheme to achieve a high level of security against quantum computing *** first discuss quantum computing attacks on classic blockchains,including attacks on hash functions,digital signatures,and consensus *** then introduce quantum technologies,such as a quantum hash function(QHF),a quantum digital signature(QDS),and proof of authority(PoA)consensus mechanism,into our scheme to improve the security of the blockchain *** security analysis demonstrates that our scheme offers superior security against quantum and classic ***,we compare our scheme with previous works,showing that our scheme has achieved a perfect balance in terms of practicality,reliability,scalability,and ***,this work contributes to the ongoing research on quantum blockchain in the quantum era.

关键词： Quantum blockchain quantum hash function quantum digital signature

Study on I/O response time bounds of networked storage systems

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Frontiers of Electrical and electronic engineering in China 2006年第4期1卷 470-474页

作者： CUI Bao-jiang liu Jun WANG gang liu Jing Information Security Centre 126# Beijing University of Posts and TelecommunicationsBeijing 100876China Department of Information Science and Technology Tianjin University of Finance and EconomicsTianjin 300222China Department of Computer Science Nankai UniversityTianjin 300071China

In order to predict and improve the performance of networked storage systems,this paper explored the rela-tionship between the system I/O response time and its per-formance factors by quantitative analytical *** analyzing data flow in networked RAID storage system,we established its analytical model utilizing closed queueing networks and studied the performance bounds of the system I/O response *** results show that the theo-retical bounds are found to be in agreement with the actual performance bounds of the networked RAID storage system and reflect the dynamic trend of its actual ***,it concludes that the CPU processing power and cache hit rate of the central storage server are the key factors affecting the I/O response time as the concurrent jobs are lower,while the network bandwidth and cache hit rate of the central storage server become the key factors as the concurrent jobs go higher.

关键词： networked storage performance modeling queueing networks I/O response time

A Novel Post-Quantum Blind Signature for Log System in Blockchain

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Computer Systems Science & engineering 2022年第6期41卷 945-958页

作者： gang Xu Yibo Cao Shiyuan Xu Ke Xiao Xin liu Xiubo Chen Mianxiong Dong school of Information Science and Technology North China University of TechnologyBeijing100144China beijing Key Laboratory of Security and Privacy in Intelligent Transportation Beijing Jiaotong UniversityBeijing100044China school of Information engineering Inner Mongolia University of Science&TechnologyBaotou014010China Information Security Center State Key Laboratory of Networking and Switching TechnologyBeijing University of Posts and TelecommunicationsBeijing100876China Muroran Institute of Technology Muroran050-8585Japan

In recent decades, log system management has been widely studied fordata security management. System abnormalities or illegal operations can befound in time by analyzing the log and provide evidence for intrusions. In orderto ensure the integrity of the log in the current system, many researchers havedesigned it based on blockchain. However, the emerging blockchain is facing significant security challenges with the increment of quantum computers. An attackerequipped with a quantum computer can extract the user's private key from thepublic key to generate a forged signature, destroy the structure of the blockchain,and threaten the security of the log system. Thus, blind signature on the lattice inpost-quantum blockchain brings new security features for log systems. In ourpaper, to address these, firstly, we propose a novel log system based on post-quantum blockchain that can resist quantum computing attacks. Secondly, we utilize apost-quantum blind signature on the lattice to ensure both security and blindnessof log system, which makes the privacy of log information to a large ***, we enhance the security level of lattice-based blind signature under therandom oracle model, and the signature size grows slowly compared with *** also implement our protocol and conduct an extensive analysis to prove theideas. The results show that our scheme signature size edges up subtly comparedwith others with the improvement of security level.

关键词： Log system post-quantum blockchain lattice blind signature privacy protection

Distributed interference suppression scheme for multi-cell uplink OFDMA system based on non-cooperative game

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The Journal of China Universities of posts and telecommunications 2011年第2期18卷 65-71页

作者： CHANG Ling-jun TANG Bi-hua XIE gang ZENG Ling-kang liu Kai-ming school of electronic engineering Beijing University of Posts and Telecommunications Beijing 100876 China school of Information and Communication engineering Beijing University of Posts and Telecommunications Beijing 100876 China

In this paper,a distributed interference suppression scheme is proposed for multi-cell uplink orthogonal frequency division multiple access（OFDMA） ***,we model resource allocation process as a non-cooperative *** we show the concept of Nash equilibrium（NE） and investigate its existence and uniqueness in *** enhance the performance of multi-cell OFDMA system,the further improvement process based on NE is *** adjustable parameters are set to make the system achieve different tradeoffs between the total capacity and *** results show that the proposed scheme can greatly improve the system performance comparing with conventional scheme.

关键词： multi-cell non-cooperative game OFDMA uplink ICI

Utilizing the dropped packets for data delivery in VANETs

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The Journal of China Universities of posts and telecommunications 2013年第3期20卷 48-52页

作者： SONG Chao liu Ming GONG Hai-gang CHEN Gui-hai CAO Jian-nong school of Computer Science and engineering University of Electronic Science and Technology of China school of Computer Science and engineering Shanghai Jiao Tong University Internet and Mobile Computing Laboratory Department of Computing Hong Kong Polytechnic University

Timely and cost-efficient multi-hop data delivery among vehicles is essential for vehicular ad-hoc networks （VANETs）, and various routing protocols are envisioned for infrastructure-less vehicle-to-vehicle （V2V） communications. Generally, when a packet （or a duplicate） is delivered out of the routing path, it will be dropped. However, we observe that these packets （or duplicates） may also be delivered much faster than the packets delivered along the original routing path. In this paper, we propose a novel tree based routing scheme （TBRS） for ultilizing the dropped packets in VANETs. In TBRS, the packet is delivered along a routing tree with the destination as its root. And when the packet is delivered out its routing tree, it won＇t be dropt immediately and will be delivered for a while if it can arrive at another branch of the tree. We conduct the extensive simulations to evaluate the performance of TBRS based on the road map of a real city collected from Google Earth. The simulation results show that TBRS can outperform the existing protocols, especially when the network resources are limited.

关键词： routing vanet opportunistic forwarding

Self-Supervised Graph Neural Networks for Accurate Prediction of Néel Temperature

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Chinese Physics Letters 2022年第6期39卷 5-11页

作者： Jian-gang Kong Qing-Xu Li Jian Li Yu liu Jia-Ji Zhu school of Science Chongqing University of Posts and TelecommunicationsChongqing 400065China Institute for Advanced Sciences Chongqing University of Posts and TelecommunicationsChongqing 400065China Southwest Center for Theoretical Physics Chongqing UniversityChongqing 401331China Inspur electronic Information Industry Co. LtdBeijing 100085China

Antiferromagnetic materials are exciting quantum materials with rich physics and great potential for *** the other hand, an accurate and efficient theoretical method is highly demanded for determining critical transition temperatures, Néel temperatures, of antiferromagnetic materials. The powerful graph neural networks(GNNs) that succeed in predicting material properties lose their advantage in predicting magnetic properties due to the small dataset of magnetic materials, while conventional machine learning models heavily depend on the quality of material descriptors. We propose a new strategy to extract high-level material representations by utilizing self-supervised training of GNNs on large-scale unlabeled datasets. According to the dimensional reduction analysis, we find that the learned knowledge about elements and magnetism transfers to the generated atomic vector representations. Compared with popular manually constructed descriptors and crystal graph convolutional neural networks, self-supervised material representations can help us to obtain a more accurate and efficient model for Néel temperatures, and the trained model can successfully predict high Néel temperature antiferromagnetic materials. Our self-supervised GNN may serve as a universal pre-training framework for various material properties.

关键词： utilizing networks neural

A Searchable Encryption Scheme Based on Lattice for Log Systems in Blockchain

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Computers, Materials & Continua 2022年第9期72卷 5429-5441页

作者： gang Xu Yibo Cao Shiyuan Xu Xin liu Xiu-Bo Chen Yiying Yu Xiaojun Wang school of Information Science and Technology North China University of TechnologyBeijing100144China school of Information engineering Inner Mongolia University of Science and TechnologyBaotou014010China Information Security Center State Key Laboratory of Networking and Switching TechnologyBeijing University of Posts and TelecommunicationsBeijing100876China school of electronic engineering Dublin City UniversityDublinIreland

With the increasing popularity of cloud storage,data security on the cloud has become increasingly *** encryption has the ability to realize the privacy protection and security of data in the ***,with the continuous development of quantum computing,the standard Public-key Encryption with Keyword Search(PEKS)scheme cannot resist quantumbased keyword guessing ***,the credibility of the server also poses a significant threat to the security of the retrieval *** paper proposes a searchable encryption scheme based on lattice cryptography using blockchain to address the above ***,we design a lattice-based encryption primitive to resist quantum keyword guessing ***,blockchain is to decentralize the cloud storage platform’s jurisdiction of *** also ensures that the traceability of keyword retrieval process and maintains the credibility of search result,which malicious platforms are prevented as much as possible from deliberately sending wrong search *** but not least,through security analysis,our proposed scheme satisfies the credibility and unforgeability of the keyword *** comprehensive performance evaluates that our scheme has certain advantages in terms of efficiency compared with others.

关键词： Lattice cryptography searchable encryption blockchain privacy protection log system information security applied cryptography

Femtosecond Pulse Propagation in a Symmetric Gap Surface Plasmon Polariton Waveguide

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Chinese Physics Letters 2011年第8期28卷 300-303页

作者： LU Zhi-Xin YU Li liu Bing-Can ZHANG Kai SONG gang State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and TelecommunicationsBeijing 100876 school of Science Beijing University of Posts and TelecommunicationsBeijing 100876 Department of Fundamental Courses Academy of Armored Force EngineeringBeijing 100072

We investigate the effect of a symmetric gap surface plasmon polariton(SPP)waveguide on ultrashort pulses with a central wavelength of 850 nm and a width of 20 fs using the finite-difference time-domain *** length of the waveguide is 560 *** and nonlinear dielectrics are chosen to be the core layers whose thicknesses are set to be 20,50,100 and 200 nm,*** results show that for the linear case,strong coupling of the SPP mode can lead to the pulse tailing phenomenon and spectrum compression due to waveguide *** the nonlinear case,the output pulse is broadened and the fluctuation is more complex than the input pulse and can induce the spectrum splitting as *** smaller the thickness of the core layer is,the more distinct the pulse distortion is,which may be due to the combined effects of dispersion,waveguide resonance and self-phase modulation.

关键词： waveguide Femto Waveguide

Multi-class classifier of non-speech audio based on Fisher kernel

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Frontiers of Electrical and electronic engineering in China 2010年第1期5卷 72-76页

作者： Rongyan WANG gang liu Jun GUO Yu FANG Pattern Recognition and Intelligent System Laboratory Beijing University of Posts and TelecommunicationsBeijing 100876China

Traditional multi-class classification methods based on Fisher kernel combine generative models such as Gaussian mixture models(GMMs)of all the classes ***,the combination generates high dimensional feature vectors and leads to large *** this paper,a new classification method is *** method adopts an intelligent feature space selection strategy by clustering similar Gaussian mixtures in order to reduce the feature *** classification experiments show that the proposed method is more accurate and effective with less computation compared with traditional methods.

关键词： Fisher kernel support vector machine(SVM) Gaussian mixture model(GMM) mixture clustering