为优化HTTPS性能,研究了TCP特性对TLS性能的影响.通过数学模型分析,指出了2种不同条件下,TLS Record Size选择对用户首数据响应延时(TTFB)、首页面响应延时(TTFP)、网络效益、吞吐率等参数指标的影响.大的TLS Record Size提高网络吞吐...为优化HTTPS性能,研究了TCP特性对TLS性能的影响.通过数学模型分析,指出了2种不同条件下,TLS Record Size选择对用户首数据响应延时(TTFB)、首页面响应延时(TTFP)、网络效益、吞吐率等参数指标的影响.大的TLS Record Size提高网络吞吐和利用率,但增加了用户首数据响应延时,适合需要高吞吐但响应延时不敏感的场景;小的TLS Record Size降低用户响应延时却降低了网络吞吐和利用率,适合对用户响应时间敏感的场景.展开更多
机车安全信息综合监测装置为机车众多车载监测设备提供了统一的机车安全信息。随着铁路智能化的深入发展,人们对机车安全信息综合监测装置数据的安全性要求日益提高。缺乏对机车安全信息综合监测装置有效的管控手段,会导致外围设备非法...机车安全信息综合监测装置为机车众多车载监测设备提供了统一的机车安全信息。随着铁路智能化的深入发展,人们对机车安全信息综合监测装置数据的安全性要求日益提高。缺乏对机车安全信息综合监测装置有效的管控手段,会导致外围设备非法接入,造成通信总线被干扰。针对机车安全信息综合监测装置存在的问题,基于TAX18平台开展接入鉴权技术研究,提出了一套技术解决方案。在硬件上构建新的RS485通信总线架构,在软件上采用数据包传输层安全性协议(Datagram Transport Layer Security,DTLS)、mbedTLS等技术,实现机车安全信息综合监测装置相关外设的鉴权加密。应用的嵌入式领域加解密库具有较高的稳定性和可靠性,可从根本上解决外设接入问题,保障机车安全信息综合监测装置通信的可靠性和数据的安全性。展开更多
Many coal enterprises have built the videoconference systems on their LAN (Local Area Network). As the development of these enterprises, their organizations are distributed over our country and even over the world. ...Many coal enterprises have built the videoconference systems on their LAN (Local Area Network). As the development of these enterprises, their organizations are distributed over our country and even over the world. Therefore, the videoconference systems have to run over WAN (Wide Area Network). Normally, the structure of a videoconference system is center_division including MCU (multi control unit)and participants. No QoS and security assurance are available now because all videoconference system is based on TCP/IP. Therefore, the system stability is absolutely depended on the Network. This paper discussed how to anti ARP attacking. The method discussed in this paper is based on TCP/IP.展开更多
文摘为优化HTTPS性能,研究了TCP特性对TLS性能的影响.通过数学模型分析,指出了2种不同条件下,TLS Record Size选择对用户首数据响应延时(TTFB)、首页面响应延时(TTFP)、网络效益、吞吐率等参数指标的影响.大的TLS Record Size提高网络吞吐和利用率,但增加了用户首数据响应延时,适合需要高吞吐但响应延时不敏感的场景;小的TLS Record Size降低用户响应延时却降低了网络吞吐和利用率,适合对用户响应时间敏感的场景.
文摘机车安全信息综合监测装置为机车众多车载监测设备提供了统一的机车安全信息。随着铁路智能化的深入发展,人们对机车安全信息综合监测装置数据的安全性要求日益提高。缺乏对机车安全信息综合监测装置有效的管控手段,会导致外围设备非法接入,造成通信总线被干扰。针对机车安全信息综合监测装置存在的问题,基于TAX18平台开展接入鉴权技术研究,提出了一套技术解决方案。在硬件上构建新的RS485通信总线架构,在软件上采用数据包传输层安全性协议(Datagram Transport Layer Security,DTLS)、mbedTLS等技术,实现机车安全信息综合监测装置相关外设的鉴权加密。应用的嵌入式领域加解密库具有较高的稳定性和可靠性,可从根本上解决外设接入问题,保障机车安全信息综合监测装置通信的可靠性和数据的安全性。
文摘Many coal enterprises have built the videoconference systems on their LAN (Local Area Network). As the development of these enterprises, their organizations are distributed over our country and even over the world. Therefore, the videoconference systems have to run over WAN (Wide Area Network). Normally, the structure of a videoconference system is center_division including MCU (multi control unit)and participants. No QoS and security assurance are available now because all videoconference system is based on TCP/IP. Therefore, the system stability is absolutely depended on the Network. This paper discussed how to anti ARP attacking. The method discussed in this paper is based on TCP/IP.