ITR/SI: Quantum Communication and Cryptography: Protocols and Systems

标题：量子通信和密码学：协议和系统功能量子计算机将使所有用于互联网安全通信的公钥加密协议（例如RSA， Diffie-Hellman）变得不安全；相反，QKD可以拯救互联网并实现安全的公共通信。同样，如果双方可以提前共享EPR对，超密集编码可能会使信道的经典容量翻倍。本项目旨在对量子信息处理中的问题进行理论研究，包括：(1)纠缠净化和蒸馏算法；(2)各种量子信道的容量结果；(3)通过局部量子操作和经典通信（LOCC）进行有效的纠缠操纵和纯状态管理；(4)利用实际系统进行量子密钥分发。(5)新颖的信息安全量子加密协议，只有量子系统可能启用，但使用经典加密协议不存在。

EIA-0113440Vwani RoychowdhuryUniversity of California at Los AngeleTitle: Quantum Communication and Cryptography: Protocols and SystemsA functional quantum computer would render all public-key cryptographic protocols (e.g., RSA, Diffie-Hellman), used for secure communication over the Internet, insecure; conversely, QKD could save the Internet and enable secure public communication. Similarly, super-dense coding can potentially double the classical capacity of a channel, if the parties could share EPR pairs in advance. This project is aimed at a theoretical study of issues in quantum informatin processing, including (1) algorithms for entanglement purification and distillation, (2) Capacity results for various quantum channels, (3) efficient entanglement manipulation and pure state management via local quantum operations and classical communication (LOCC), (4) quantum key distribution using practical systems, and (5) novel informationally-secure quantum cryptographic protocols that only quantum systems might enable, but are not known to exist using classical cryptographic protocols.