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Dynamic data auditing scheme for big data storage

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Frontiers of Computer Science 2020年第1期14卷 219-229页

作者： Xingyue CHEN Tao SHANG Feng ZHANG Jianwei LIU zhenyu guan School of Electronic and Information Engineering Beihang UniversityBeijing 100083China School of Cyber Science and Technology Beihang UniversityBeijing 100083China

When users store data in big data platforms,the integrity of outsourced data is a major concern for data owners due to the lack of direct control over the ***,the existing remote data auditing schemes for big data platforms are only applicable to static *** order to verify the integrity of dynamic data in a Hadoop big data platform,we presents a dynamic auditing scheme meeting the special requirement of ***,a new data structure,namely Data Block Index Table,is designed to support dynamic data operations on HDFS(Hadoop distributed file system),including appending,inserting,deleting,and *** combined with the MapReduce framework,a dynamic auditing algorithm is designed to audit the data on HDFS *** shows that the proposed scheme is secure enough to resist forge attack,replace attack and replay attack on big data *** is also efficient in both computation and communication.

关键词： big data data security remote data auditing dynamic update privacy protection

A Novel Objective Quality Assessment Method for Video Conferencing Coding

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China Communications 2019年第4期16卷 89-104页

作者： zhenyu guan Hanzheng Lv Yuan Ma Jingze Zhang School of Cyber Science and Technology BeiHang University School of Electronic and Information Engineering BeiHang University

Most recently, due to the demand of immersive communication, region-of-interest-based(ROI) high efficiency video coding(HEVC) approaches in conferencing scenarios have become increasingly important. However, there exists no objective metric, specially developed for efficiently evaluating the perceived visual quality of video conferencing coding. Therefore, this paper proposes a novel objective quality assessment method, namely Gaussian mixture model based peak signal-tonoise ratio(GMM-PSNR), for the perceptual video conferencing coding. First, eye tracking experiments, together with a real-time technique of face and facial feature extraction, are introduced. In the experiments, importance of background, face, and facial feature regions is identified, and it is then quantified based on eye fixation points over test videos. Next, assuming that the distribution of the eye fixation points obeys Gaussian mixture model, we utilize expectation-maximization(EM) algorithm to generate an importance weight map for each frame of video conferencing coding, in light of a new term eye fixation points/pixel(efp/p). According to the generated weight map, GMM-PSNR is developed for quality assessment by assigning different weights to the distortion of each pixel in the video frame. Finally, we utilize some experiments to investigate the correlation of the proposed GMM-PSNR and other conventional objective metrics with subjective quality metrics. The experimental results show the effectiveness of GMM-PSNR.

关键词： visual quality assessment perceptual conferencing video coding immersive communication

Physical Unclonable Functions for IoT Device Authentication

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Journal of Communications and Information Networks 2019年第4期4卷 44-54页

作者： zhenyu guan Hao Liu Yuyao Qin Beihang University Beijing 100191China

The Internet of things(IoT),as an extension of the Internet,has become a trend of network develop-ment *** order to protect the integrity and authenticity of the information in the IoT,an identity authentication protocol applied to the networked devices is designed in this paper,using the physical unclonable function(PUF)to extract the uniqueness and tamper resistance of the randomness in the manufacturing process of the physical *** propose the protocol including the database,accessed devices,access devices and users in the specific network *** on the unique identification information generated by the PUF embedded in devices and passwords set by users,devices and users identities could be verified through zero-knowledge *** performance analysis and the experiment at the end of this work show that our protocol provides users with a strong security guarantee for IoT devices.

关键词： IoT PUF identity authentication SRAM

Lightweight and Manageable Digital Evidence Preservation System on Bitcoin

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Journal of Computer Science & Technology 2018年第3期33卷 568-586页

作者： Mingming Wang Qianhong Wu Bo Qin Qin Wang Jianwei Liu zhenyu guan School of Electronic and Information Engineering Beihang University Beijing 100191 China School of Information Renmin University of China Beijing 100872 China

An effective and secure system used for evidence preservation is essential to possess the properties of anti- loss, anti-forgery, anti-tamper and perfect verifiability. Traditional architecture which relies on centralized cloud storage is depressingly beset by the security problems such as incomplete confidence and unreliable regulation. Moreover, an expensive, inefficient and incompatible design impedes the effort of evidence preservation. In contrast, the decentralized blockchain network is qualified as a perfect replacement for its secure anonymity, irrevocable commitment, and transparent traceability. Combining with subliminal channels in blockchain, we have weaved the transaction network with newly designed evidence audit network. In this paper, we have presented and implemented a lightweight digital evidence-preservation architecture which possesses the features of privacy-anonymity, audit-transparency, function-scalability and operation-lightweight. The anonymity is naturally formed from the cryptographic design, since the cipher evidence under encrypted cryptosystem and hash-based functions leakages nothing to the public. Covert channels are efficiently excavated to optimize the cost, connectivity and security of the framework, transforming the great computation power of Bitcoin network to the value of credit. The transparency used for audit, which relates to the proof of existence, comes from instant timestamps and irreversible hash functions in mature blockchain network. The scalability is represented by the evidence chain interacted with the original blockchain, and the extended chains on top of mainchain will cover the most of auditors in different institutions. And the lightweight, which is equal to low-cost, is derived from our fine-grained hierarchical services. At last, analyses of efficiency, security, and availability have shown the complete accomplishment of our system.

关键词： blockchain covert channel data auditing digital evidence

An attack-immune trusted architecture for supervisory aircraft hardware

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Chinese Journal of Aeronautics 2021年第11期34卷 169-181页

作者： Dongxu CHENG Chi ZHANG Jianwei LIU Dawei LI zhenyu guan Wei ZHAO Mai XU School of Cyber Science and Technology Beihang UniversityBeijing 100191China Beijing Electro-Mechanical Engineering Institute Beijing 100074China

With the wide application of electronic hardware in aircraft such as air-to-ground communication,satellite communication,positioning system and so on,aircraft hardware is facing great secure *** on the secure problem of aircraft hardware,this paper proposes a supervisory control architecture based on secure System-on-a-Chip(So C)*** proposed architecture is attack-immune and trustworthy,which can support trusted escrow application and Dynamic Integrity Measurement(DIM)without *** architecture is characterized by a Trusted Monitoring System(TMS)hardware isolated from the Main Processor System(MPS),a secure access channel from TMS to the running memory of the MPS,and the channel is *** on this architecture,the DIM program running on TMS is used to measure and call the Lightweight Measurement Agent(LMA)program running on *** this method,the Operating System(OS)kernel,key software and data of the MPS can be dynamically measured without disturbance,which makes it difficult for adversaries to attack through ***,this architecture has been fully verified on FPGA prototype *** with the existing systems,our architecture achieves higher security and is more efficient on DIM,which can fully supervise the running of application and aircraft hardware OS.

关键词： Aircraft hardware Dynamic integrity measurement Supervisory control System-on-a-Chip(SoC) Trusted computing

Genetic alterations and reduced expression of tumor suppressor p33^(ING1b) in human exocrine pancreatic carcinoma

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World Journal of Gastroenterology 2004年第24期10卷 3597-3601页

作者： guan-zhenyu Ming-HuaZhu ZhiZhu Can-RongNi Jian-MingZheng Fang-MeiLi DepartmentofPathology ChanghaiHospitalSecondMilitaryMedicalUniversityShanghai:200433China

AIM: To detect the expression of p33^ING1b protein and the change of p33^ING1b gene in pancreatic carcinoma and to evaluate the significance of p33^ING1b in pancreatic cell ***: Pathological specimens from pancreatic carcinoma and matched non-tumor pancreatic tissues were examined for p33^ING1b expression and mutation by immunohistochemistry, polymerase chain reaction singlestrand conformation polymorphisms (PCR-SSCP) and loss of heterozygosity (LOH).RESULTS: The rate of p33^ING1b protein expression was 85% (34/40). A single germline missense mutation was detected in 1 of 40 tumors located at codon 215:TGC-TCC (Cys-Ser).i-ourteen (60.9%) of 23 tumor samples snowea LUH In all of the informative markers tested, but no mutation was detected in these tumors and only two of the informative tumors lacked expressions of p33^ING1b ***: Mutation and loss of expression are not the main reasons for the disfunction of p33^ING1b in pancreatic carcinoma, an abnormality at the level of chromosome and/or transcription may inhibit their normal functions,potentially contributing to pancreatic cell carcinogenesis.

关键词：遗传作用基因表达肿瘤抑制物 p33^ING1b 外分泌胰腺癌消化系统

基于PUF的5G车联网V2V匿名认证与密钥协商协议

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计算机研究与发展 2021年第10期58卷 2265-2277页

作者：侯琬钰孙钰李大伟崔剑关振宇刘建伟北京航空航天大学网络空间安全学院北京100191 空天网络安全工业和信息化部重点实验室(北京航空航天大学) 北京100191

针对目前5G车联网中车辆之间(vehicle-to-vehicle,V2V)通信的认证与密钥协商方案算法复杂、时延高的问题,提出一种基于物理不可克隆函数(physical unclonable function,PUF)的5G车联网V2V匿名认证与密钥协商协议.协议通过引入轻量级PUF... 详细信息

针对目前5G车联网中车辆之间(vehicle-to-vehicle,V2V)通信的认证与密钥协商方案算法复杂、时延高的问题,提出一种基于物理不可克隆函数(physical unclonable function,PUF)的5G车联网V2V匿名认证与密钥协商协议.协议通过引入轻量级PUF避免了V2V认证中的数字签名操作,并精简通信步骤,成功减轻车辆的计算和通信开销.协议还借助PUF实现了车辆的车载单元(on board unit,OBU)和5G SIM卡的绑定,解决了身份假冒问题.同时,通过构建身份索引表,实现监管部门通过5G服务网(serving work,SN)对车辆的伪身份溯源,满足条件匿名性要求.使用形式化工具AVISPA验证了协议在Dolve-Yao模型下的安全性,并在计算开销、通信开销、安全性方面优于已有的车联网匿名通信协议,可为5G车联网的V2V通信提供基本安全保障.

关键词： 5G V2X 伪身份物理不克隆函数双向认证密钥协商隐私保护

基于Rowhammer物理不可克隆函数的物理设备测绘框架

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电子与信息学报 2023年第9期45卷 3200-3209页

作者：刘镝徐闻含王文东李大伟关振宇刘建伟北京航空航天大学网络空间安全学院北京100191

网络空间测绘的核心问题是准确识别和动态跟踪设备。然而,随着匿名化技术的发展,设备可以拥有多个IP地址和MAC地址。这使得通过传统的测绘技术将多个虚拟属性映射到同一个物理设备上变得更加困难。该文提出一种基于物理不可克隆函数(PUF... 详细信息

网络空间测绘的核心问题是准确识别和动态跟踪设备。然而,随着匿名化技术的发展,设备可以拥有多个IP地址和MAC地址。这使得通过传统的测绘技术将多个虚拟属性映射到同一个物理设备上变得更加困难。该文提出一种基于物理不可克隆函数(PUF)的测绘框架。该框架可以主动检测网络空间中的物理资源,并根据物理指纹构建资源画像来动态跟踪设备。同时,该文提出一种在配备第四代双倍速率(DDR4)内存的个人电脑(PC)上实现基于Rowhammer的动态随机存取存储器物理不可克隆函数(DRAM PUF)的方法。性能评估表明,该方法在PC上提取的Rowhammer PUF的响应是唯一且可靠的,并可以作为设备的唯一物理指纹。实验结果表明,即使目标设备修改了MAC地址、IP地址或重装了操作系统,该文提出的框架仍然可以通过构建一个用于设备匹配的物理指纹数据库,对目标设备进行准确的标识。

关键词：网络空间测绘物理指纹物理不可克隆函数 Rowhammer物理不可克隆函数

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新形势下农机推广工作的思考

农业技术与装备 2010年第12期 71-72页

作者：关振君辽宁省沈阳市苏家屯区农机化技术推广服务站 110101

现代农业建设步伐不断加大,对农机推广工作提出了新的要求。农业机械化是现代农业最基本、最显著的特点,发展农业机械化是农业现代化建设的必由之路。农业经济结构的调整,农业的产业化、规模化和集约化经营,对农业机械化形成新的巨大需... 详细信息

现代农业建设步伐不断加大,对农机推广工作提出了新的要求。农业机械化是现代农业最基本、最显著的特点,发展农业机械化是农业现代化建设的必由之路。农业经济结构的调整,农业的产业化、规模化和集约化经营,对农业机械化形成新的巨大需求,也给农机推广工作带来了新的发展机遇。

关键词：新形势基层农机推广思考