CIF: Small: Collaborative Research: Secret Key Generation Under Resource Constraints

CIF：小型：协作研究：资源限制下的密钥生成

• 批准号: 1618017
• 负责人: Lifeng Lai
• 金额: $ 25万
• 依托单位: Worcester Polytechnic Institute
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-08-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1618017&HistoricalAwards=false
• 关键词: CIF; Small; Collaborative; Research; Secret

Common shared keys, which can be used for encryption/decryption, authentication and various other security primitives, plays a fundamental role in securing modern digital systems. Due to such significant importance, there has been a tremendous amount of work on the design of key generation/distribution schemes. Despite of these efforts, significant challenges, such as scalability and availability, remain to be fully addressed. This project investigates information theoretic approaches for secret key generation with focuses on fundamental and challenging issues under more realistic models. The resulting schemes are anticipated to be more easily applied to the design of practical wireless networks. The project will leverage collaboration with industries and will actively involve students with various backgrounds.In particular, the project will develop key generation schemes under the framework of key generation via public discussion. The standard scheme under this framework is a so-called "omniscience" scheme. However, such a scheme requires all nodes in the network to transmit, assumes the public discussion is heard noiselessly by all nodes in the network, and does not take the implementation complexity into consideration. While these assumptions enable the tractability of the problems and facilitate to obtain crucial insights, in order for such studies to provide useful and accurate guidance in practice, realistic constraints must be taken into consideration, which pose three fundamental directions that this project will explore. In this project, thrust 1 focuses on key generation with vocality constraints that addresses the following fundamental question: for a general source network, is it possible to design schemes that involve only a subset of nodes to talk but still achieve the key capacity? Thrust 2 focuses on key generation with physical channel constraints. In particular, motivated by constraints associated with physical channels, the project will design key generation scheme for scenarios when the public discussion of each node can only be received by nodes in its transmission range and the simultaneous transmission of multiple nodes will interfere with each other. Thrust 3 focuses on key generation with complexity constraints and investigates how to minimize the complexity in the design of key generation schemes and how to reduce computational resource consumption required for key generation schemes.

通用共享密钥可用于加密/解密、身份验证和各种其他安全原语，在保护现代数字系统方面发挥着基础作用。由于如此重要​​，在密钥生成/分发方案的设计上进行了大量的工作。尽管做出了这些努力，但可扩展性和可用性等重大挑战仍有待充分解决。该项目研究密钥生成的信息论方法，重点关注更现实模型下的基本和具有挑战性的问题。由此产生的方案预计将更容易应用于实际无线网络的设计。该项目将利用与行业的​​合作，并积极吸引不同背景的学生参与。特别是，该项目将在密钥生成框架下通过公开讨论制定密钥生成方案。该框架下的标准方案就是所谓的“全知”方案。然而，这种方案需要网络中的所有节点都进行传输，并假设公共讨论被网络中的所有节点无声地听到，并且没有考虑实现的复杂性。虽然这些假设使得问题易于处理并有助于获得重要的见解，但为了使此类研究在实践中提供有用且准确的指导，必须考虑现实的限制，这构成了本项目将探索的三个基本方向。在这个项目中，主旨 1 重点关注具有声音约束的密钥生成，它解决了以下基本问题：对于通用源网络，是否有可能设计出仅涉及节点子集进行通话但仍能实现密钥容量的方案？ Thrust 2 侧重于具有物理通道限制的密钥生成。特别是，在物理信道约束的推动下，项目将针对每个节点的公共讨论只能被其传输范围内的节点接收且多个节点同时传输会互相干扰的场景设计密钥生成方案。 Thrust 3关注具有复杂性约束的密钥生成，并研究如何最小化密钥生成方案设计的复杂性以及如何减少密钥生成方案所需的计算资源消耗。