近年来，随着5G通信、物联网、云计算、区块链等新兴网络信息技术的高速发展以及新型密码分析技术的出现，攻击者具备更强的攻击能力，可以通过侧信道等攻击手段对密码设备进行分析，进而获得密钥的部分信息，并利用密钥所泄漏的信息来攻破密码算法的安全性。在这些复杂网络环境中，许多传统的密码算法已变得不再安全。此外，传统密码算法的安全性还会随着用户数量、设备数量、密钥数量、挑战数量的增多而衰减，这些实际应用场景对密码算法提出更高的安全要求。.本项目将研究如何针对密钥泄漏攻击手段以及实际应用环境中多用户、多设备、多密钥等新挑战，设计相应的密码算法，使其安全性更强、安全证明中的归约更为紧致、算法性能更优、所容忍的密钥泄漏比率更高。本项目的研究具有重要的科学价值和应用前景，不但可以有效地消减密钥泄漏攻击对密码算法的威胁，还同时解决复杂网络环境下密码算法安全性衰减的问题，为新兴网络信息技术的蓬勃发展提供安全保障。

With the rapid development of new network information technologies such as 5G wireless communication, the Internet of Things, cloud computing and blockchain, and with the advent of novel cryptanalysis techniques, attackers may launch new types of attacks on cryptographic algorithms. For example, the attacker is able to obtain leakage information about the secret key through implementing side-channel attacks on cryptographic devices, and use this key leakage information to break the security of cryptographic algorithms. In these complex network environments and in the presence of key leakage attacks, many cryptographic algorithms designed in the traditional security model become completely insecure and inapplicable. Moreover, the security of traditional cryptographic algorithms will be degrading as the number of users, the number of cryptographic devices, the number of keys and the number of challenges in these complex network environments increase, thus does not meet the security requirements for cryptographic algorithms in practical applications. .In this project, we will research on new techniques to resist key leakage attacks and to address the challenges of multi-user, multi-device and multi-key in complex network environments, and study the design of key leakage-resilient cryptographic algorithms with stronger security guarantee, tighter security reduction, better performance and higher key leakage rate. The research of this project has significant scientific value and application prospects: it can not only effectively protect cryptographic algorithms from the threat of key leakage attacks, but also solve the problem of security degradation that cryptographic algorithms face in complex network environments, thus providing enhanced security guarantee for the flourishing of new network information technologies.