Learning suggestions: Information security knowledge points are very complicated. Pay attention to understanding these contents. Some key points in the tutorial must be mastered. Pay attention to the new content in Section 1.6 of Chapter 1. The distribution of knowledge test points is as follows:
basic knowledge
21.1 Three-dimensional space of information system security
X-Security mechanism (secure operating system, secure database, application development and operation)
Y——OSI Network Reference Model
Z1-Security service (5 major elements: authentication, authority, completeness, encryption, non-repudiation )
21.1 Security Encryption Technology/Digital Signature
21.3 Security Policy
