Key points and difficulties of the course "information content security" at Harbin Institute of Technology

《 Information content security 》 Key points and difficulties of course knowledge

Chapter one summary
1. What are the subjects of network security threats ？
2. What is cyberspace ？ What are the four elements of cyberspace ？
3.《 Network security law 》 Subject in 、 What are the main objects ？ Try to list the basic responsibilities and obligations of each subject .
4. What is cyberspace ？ What is Cyberspace Security ？ What are the research directions of Cyberspace Security ？
5. The main content of the national network power strategy ？ What are the main network security departments in our government ？
6. What is cyberspace sovereignty ？ What are the basic principles ？（ Independent, equal and autonomous jurisdiction ）
7. What is information content security ？
8. What are the main threats to information content security ？ What are the typical events ？
（ Net anti-terrorism, anti-corruption, intellectual property rights, cults, anti secession, privacy protection ）
9. Information content security technology mainly includes ？
10. What are the challenges faced by information content security technology ？（ Large amount of data , High computational complexity , New network technology , Social contradictions are deep ）
（ What is the essential root of network and information security problems ？）

Chapter two Access to network information
1. What are the two types of ways to obtain network information ？ Try to compare their main characteristics .
2.BPF What is the principle of catching packets ？
3. What is the main process of the passive packet capture program ？
4.IP What information does the first part mainly contain ？ How to extract in packet analysis ？
5.TCP What information does the first part mainly contain ？ How to extract in packet analysis ？
6. How to improve the performance of packet capture system in the environment of large traffic network ？
7. How to improve the ability of single machine to catch packets ？ What core problems does zero copy packet capture mainly solve ?
8. What is the main idea of website information crawling ？ Describe the information crawling algorithm of stand-alone Web pages with pseudo code .
9. Use multiple computers to crawl information from multiple websites , What are the core problems to be solved ？ What are the main strategies ？
10. Describe the information crawling algorithm of multi machine single website with pseudo code .
11. This paper briefly introduces the composition of website information monitoring system based on active acquisition technology .
12. sketch Pagerank The main idea of the algorithm .
13. What are the search strategies for web crawling ？ What kind of application scenarios are they suitable for ？
14. Try to compare the similarities and differences between active acquisition and passive acquisition .
（ How to trace the source of illegal activities on the Internet ？）

The third chapter String matching algorithm
1. What are the classification and evaluation indicators of string matching algorithm ？
2. The main idea of string matching algorithm optimization ？
3. Try to compare the advantages and disadvantages of different string matching algorithms .
4.KMP The basic flow of the algorithm ？ Be able to give solution steps for actual data .
5.BM The basic flow of the algorithm ？（ Main data structure ） Be able to give solution steps for actual data .
6.AC The basic flow of the algorithm ？（ Failure function ） Be able to give solution steps for actual data .
7.WM The basic flow of the algorithm ？ Be able to give solution steps for actual data .
8. How to further optimize AC Algorithm ？（ Memory space optimization ）
9. How to further optimize WM Algorithm ？（ Mode length sensitivity ）
10. For tens of millions of pattern sets , How to optimize string matching algorithm ？
（ Specific IP Address or URL A pattern set of addresses , How to optimize string matching algorithm ？）

Chapter four Text classification
1. Quantitative representation of text ？ The main process of text classification system ？
2. What are the main classification methods ？ Compare their advantages and disadvantages .
3. Classification method based on rule induction ？ Be able to give solution steps for actual data .
4. Classification method based on decision tree （C4.5）？ Be able to give solution steps for actual data .
5. Bayesian classification method ？ Be able to give solution steps for actual data .
6.KNN classification method ？ Be able to give solution steps for actual data .
7. When the sample set is updated frequently , Which classification method is more suitable ？
8. What are the main clustering methods ？ What are the characteristics of each ？
9.K-Means Clustering method ?
10. Hierarchical clustering ？ The main similarities and differences of clustering methods based on splitting and aggregation ？

The fifth chapter Information content security management
1.C/S And P2P The characteristics of the publishing methods ？
2.C/S In mode , How to respond to ？
3.P2P Typical architecture of network ？
4.P2P In mode , How to respond to ？
5. Main privacy protection methods ？
6. Location privacy protection method ？

Reference materials ：
《 Network security development kit details 》
《 Flexible string matching algorithm 》
《 Text mining 》
《P2P Network measurement and analysis 》