Abstract ：

针对软件定义无人机网络(SUNET)链路状态频繁变化难以保障用户服务质量(Quality of Service, QoS)的问题，本文研究了软件定义UAV网络中包含流量管控与队列调度的自适应QoS机制。首先，利用SUNET能够获取全局链路状态信息的优势，提出一种自适应QoS流量控制机制，其综合考虑链路带宽、不同类别消息的优先级和到期时间(ToE)等QoS要求，自适应调整OpenFlow交换机的数据流表项与计量表；然后，结合Linux流量控制的优先级(PRIO)和分层令牌桶(HTB)算法设计出多级队列调度方案以实现细粒度控制。仿真结果表明，所提自适应QoS机制能够显著降低高优先级消息的传输时延与丢包率，满足不同类型消息的差异化要求。

Keyword ：

UAV网络 队列调度 QoS 软件定义网络

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Abstract ：

In today’s digitalized world, a lot of information is getting online, and the size of online data is getting huge day by day; thus, the field of data science emerged. Questions arise when there is so much massive size of data. It also makes it vulnerable to people who have malicious intentions. The gateway for surfing the internet is the web browser. Whether people use that for fair means or foul, some data is precious and sensitive. In this research, a related study about web browser forensics specifies its importance in digital forensics. These studies mention the techniques and tools for web browser forensics, investigating the Android platform as different web browsers provide their web applications. Considering all these studies, the authors go in various directions to extract evidence from the browser. This research will utilize tools like dumpzilla (based on python script), Bulk extractor, and SQLite to extract the details of evidence like history URLs, Cookies, Add-ons, and web Sessions and saved passwords in the cloud storage of the browser. For this, A scenario in the virtual environment is created that the victim browser could be exploited. Forensics tools run on two different platforms, Kali Linux and Parrot Security OS. Two other platforms are used to authenticate and verify shreds of evidence collected. There are limitations of tools. While running on different platforms, they missed capturing some shreds of evidence. After gathering the data from the victim machine, the web browser activities were predicted. There are limitations, and research offers future scope by improving the tools’ performance—this requires sound knowledge of python, access control, and system architecture. © 2022. International Journal of Network Security.All Rights Reserved

Keyword ：

Computer forensics Birds Gateways (computer networks) Electronic crime countermeasures High level languages Linux Web browsers Python Digital storage Virtual reality Access control

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Abstract ：

目的:针对齿轮测量中的双面啮合测量数据在云平台的数据处理问题,主要研究双啮误差评定方法、云端数据处理系统部署,以及云端数据处理软件设计.方法:云平台采用"Linux+Tomcat+MySQL+Java"架构,使用Javaweb技术;给出在云平台部署Web应用的方法;设计齿轮双啮测量数据云处理系统,实现客户端与云端、仪器端与云端的数据交互.齿轮双啮测量数据处理软件设计中的几个要点:网络IP地址、软件前端访问界面、齿轮双啮测量数据库及双啮误差评定.结果:给出软件界面,可实现数据在云平台的上传、下载,并将仪器端上传的齿轮双啮测量相关数据进行误差评定,得到齿轮双啮测量结果,示例中被测齿轮的径向综合总偏差为32.7μm、一齿径向综合偏差为9.5μm,按标准GB/T 38192-2019评定为8级精度.结论:齿轮双啮测量数据云处理系统部署及实现相关技术研究,对精密仪器测量数据云处理具有一定的参考价值.

Keyword ：

齿轮测量 Javaweb 双面啮合测量 云平台 云处理

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Abstract ：

With the development and progress of automobile industry, the automobile electronic control system has put forward higher and higher requirements to the controller. From the realization of the controller to vehicle test, all need hardware in loop test, and ensure the real test results of core is to run in real-time processor on the real-time operating system, at the same time with a single core processor in the operation of the real-time system bottlenecks, this paper USES the multi-core processor platform to build real-time problems of real-time system research. The Linux system is studied in this paper after the defects in real time, this paper proposes a by adding preemption patch solution to realize real- time Linux system, at the same time, using the advantages of multi-core processors, the CPU resources of real-time and non- real-time tasks are divided, and the number of interrupts on the CPU where the real-time task is located is reduced. Finally, a specific RTOS development case based on the PREEMPT_RT patch is given, and on this basis, the effectiveness of the proposed scheme in the real-time performance of the system is verified. © 2021 IEEE.

Keyword ：

Real time systems Linux Interactive computer systems Automotive industry ARM processors

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Abstract ：

针对Docker动态迁移中高脏页率内存被重复拷贝问题,提出了基于Markov的Docker动态迁移优化算法.首先利用linux的内存跟踪机制获取内存页被修改的情况,之后将获取的数据输入Markov预测算法,根据预测结果求出高脏页率内存并将其放到后期传输.实验表明,该方案能有效减少高脏页率内存的重复拷贝,特别是在高负载的情况下,同时能减少迭代次数约25.20％,缩短停机时间约7.14％.

Keyword ：

Docker Markov算法 动态迁移 云计算

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Abstract ：

Information level protection standard 2.0 requires trusted verification of system bootstrappers, system programs, etc. of server equipment based on trusted root. According to the requirements of information level protection standard, this paper puts forward a network trusted start-up scheme based on the trusted platform control module to guarantee the security and trust of the server's BIOS firmware, PXE boot file and Linux system file. When publishing BIOS firmware, PXE startup file, Linux system file, the state-secret algorithm SM3 is used to calculate the summary value as the benchmark value, and stored in the trusted platform control module, BIOS firmware, Linux boot file. When the server starts up with PXE, the BIOS firmware is measured by the Trusted Platform Control Module, the BIOS Start Environment Measures PXE Boot File, and the PXE Boot File measures the Linux system file. The trusted platform control module is the trust root level measurement level, the first level of trust level, the trust chain, the implementation of a trusted server operating environment. The method proposed in this paper is tested on the domestic autonomous controllable Sunway server, and the experimental results show that the method proposed in this paper is feasible. © 2020 IEEE.

Keyword ：

Firmware Linux Trusted computing

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Abstract ：

With the digital development of the industry, the deployment of IoT devices has developed rapidly, and higher requirements have been placed on the management of the devices and the large amount of data generated. To achieve the real Internet of Things, the Internet of Things cloud platform is indispensable. The traditional IoT web server communication platform has the disadvantages of large system resource consumption, long system response time, and poor real-time transmission of information. This paper proposes a cloud platform-based IoT monitoring system solution based on the advantages of the security and stability of the cloud platform and super-computing capabilities. This system uses the MQTT protocol to be compatible with different devices to achieve remote control and data collection of IoT devices. The real-time push solution based on Redis and WebSocket is used to display the collected data of the IoT device on the chart in real time with the help of the E-Chart plug-in. In this article, we explained the architecture of the framework of the solution, and solved the identified challenges of data communication and device concurrency in this field, as well as the real-time nature of the IoT data. Finally, the real-time performance and reliability of our solution are evaluated based on the use case scenario experimental data. Not only is the operation simple, but it is also compatible with the two software platforms of Windows and Linux, which can meet the needs of the Internet of Things monitoring system. © 2020 IEEE.

Keyword ：

Internet of things Computer operating systems Display devices Monitoring Digital devices Remote control

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Abstract ：

PXE启动机制通过网络下载操作系统文件并启动操作系统,广泛应用于服务器网络启动。通过可信计算技术保障PXE启动过程的安全可信,防止PXE启动文件被恶意篡改,确保服务器的安全可信运行。网络安全等级保护标准要求基于可信根对服务器设备的系统引导程序、系统程序等进行可信验证。根据等级保护标准要求,提出一种基于TPCM的服务器可信PXE启动方法,保障服务器的BIOS固件、PXE启动文件、Linux系统文件的安全可信。在服务器进行PXE启动时,由TPCM度量BIOS固件,由BIOS启动环境度量PXE启动文件,由PXE启动环境度量Linux系统文件。以TPCM为信任根逐级度量、逐级信任,建立信任链,建立可信...

Keyword ：

可信平台控制模块 信息安全 可信计算 可信启动

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Abstract ：

With the digital development of the industry, the deployment of IoT devices has developed rapidly, and higher requirements have been placed on the management of the devices and the large amount of data generated. To achieve the real Internet of Things, the Internet of Things cloud platform is indispensable. The traditional IoT web server communication platform has the disadvantages of large system resource consumption, long system response time, and poor real-time transmission of information. This paper proposes a cloud platform-based IoT monitoring system solution based on the advantages of the security and stability of the cloud platform and super-computing capabilities. This system uses the MQTT protocol to be compatible with different devices to achieve remote control and data collection of IoT devices. The real-time push solution based on Redis and WebSocket is used to display the collected data of the IoT device on the chart in real time with the help of the E-Chart plug-in. In this article, we explained the architecture of the framework of the solution, and solved the identified challenges of data communication and device concurrency in this field, as well as the real-time nature of the IoT data. Finally, the real-time performance and reliability of our solution are evaluated based on the use case scenario experimental data. Not only is the operation simple, but it is also compatible with the two software platforms of Windows and Linux, which can meet the needs of the Internet of Things monitoring system.

Keyword ：

IoT device monitoring MQTT real-time push

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Abstract ：

以普通摄像头为例,创新性地将可信计算技术应用到摄像头系统中.基于国产可信密码模块TCM,以可信链思想为依托,全程保障服务端、传输过程以及客户端的安全.通过由底至顶,兼顾软、硬件,层层度量的方式来确保摄像头的数据安全与行为可控.该可信摄像头运行在Linux环境下,基于可信框架CUBE与TCM模拟器,同时配合我国自主研发的国密算法,初步实现了可信技术在摄像头上的应用.此外,目前可信计算技术在物联网上尚未有实际落地应用,因此可以认为,该设计将是基于国产可信计算生态圈,扩展可信计算应用范围的一次重要尝试.

Keyword ：

摄像头安全 物联网安全 可信计算 TCM

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