(As one of the information security series teaching materials, this book comprehensively and systematically introduces the core technology of network security as one of the main contents of information security and its use in e-commerce. The content of the book is divided into three parts. The first part (Chapters 1 to 2) gives a detailed security analysis of the network system on the basis of a brief introduction to the Internet system; the second part (Chapters 3 to 7) is about Concentrated analysis of network security mainstream technology, including PKI, firewall, virtual private network, intrusion/intrusion detection and virus protection; the third part (Chapter 8) analyzes e-commerce as a network security technology. There are exercises at the back of each chapter to consolidate the relevant knowledge.
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