Network and Information Security

Abstract

This paper provides a systematic review and comprehensive analysis of network and information security, addressing the complex threats currently confronting cyberspace. Starting from an examination of various types of cyber attacks and their technical characteristics, and incorporating case studies of typical security incidents, this paper reveals the evolution trends in attack methodologies and their impact on critical information infrastructure. At the technical level, this study constructs an information security technology framework centered around encryption and authentication technologies, as well as intrusion detection and defense mechanisms, while exploring implementation pathways for multi-layered security protection. At the management and policy level, this study introduces a security risk assessment methodology, discusses the processes of risk identification, quantification, and hierarchical control, and proposes optimization recommendations regarding the establishment of security policies and emergency response mechanisms. This paper aims to serve as a reference for technical architecture design and security governance practices within the field of network and information security, while providing theoretical support for enhancing overall security protection capabilities and risk mitigation capabilities.