TWC: Option: Medium: Measurement-Based Design and Analysis of Censorship Circumvention Schemes

TWC：选项：中：基于测量的审查规避方案设计和分析

• 批准号: 1314637
• 负责人: Nicholas Hopper
• 金额: $ 113.73万
• 依托单位: University of Minnesota-Twin Cities
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-09-01 至 2018-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1314637&HistoricalAwards=false
• 关键词: TWC; Option; Medium; Measurement; Based

The Internet has become one of the most effective and common means of conveying expression that is likely to be controversial or suppressed. This freedom of expression is threatened by the now widespread practice of Internet censorship by both private and state interests.The Tor network is one of several tools designed to allow users to safely and efficiently access censored content through one or more relay computers. Using these relays makes it difficult for a censor to determine what content is being accessed by whom. Unfortunately, this also makes it hard to measure the use and performance of these tools, leading to challenges in assessing the impact of the tools, and the security and performance of proposed alternatives.This project is developing protocols and software to address these challenges, addressing three specific aims:1. Developing and deploying cryptographic protocols that safely and privately measure and release important characteristics of the dynamics of the Tor network, including: number of users over time, user uptime and downtime distributions, user churn, network load, and exit statistics. 2. Enhancing the security and performance of Tor, using the data collected to improve evaluations.3. Improving generic methods to circumvent relay blocking, including proxy distribution schemes, protocol steganography, and decoy routing.The project is expected to result in widely-used datasets for evaluating censorship circumvention schemes, training of undergraduate and graduate students, and broad dissemination of free software that promotes freedom of expression on the Internet, against regimes that strongly oppose such expression.

互联网已成为传达可能引起争议或被抑制的最有效和常见的手段之一。这种表达自由受到私人和州利益的互联网审查的广泛实践的威胁。TOR网络是旨在允许用户通过一台或多台接力计算机安全有效访问审查内容的几种工具之一。使用这些继电器使审查员很难确定谁正在访问谁的内容。 不幸的是，这也使得难以衡量这些工具的使用和性能，从而在评估工具的影响方面面临挑战，以及拟议的替代方案的安全性和性能。该项目正在开发解决这些挑战的协议和软件，解决了三个具体目标：1。开发和部署加密协议，这些协议可以安全地测量和释放TOR网络动力学的重要特征，包括：随着时间的推移，用户正常运行时间和停机时间分布，用户流失，网络负载和退出统计信息的数量。 2。使用收集的数据来提高TOR的安全性和性能来改善评估3。改进的通用方法来规避继电器阻塞，包括代理分配方案，协议隐志和诱饵路由。预计该项目将导致广泛使用的数据集，用于评估审查计划，对本科生和研究生的培训，研究生和研究生的培训，以及对互联网上表达的自由的自由，以反对反对，对互联网进行了广泛的表达。