对网络安全问题的探讨

分析了黑客经过侦察、扫描、攻击、维护访问权和掩盖踪迹等几个阶段实施攻击的一般过程和攻击工具的新特点，分析了系统脆弱性研究的概况，说明了源码分析、反汇编、调试、网络数据包分析、黑箱测试法、基本原理分析法和类推法等发现系统脆弱性的方法，提出了一些加强系统安全的措施。

Penetration to network security

The procedure of network attacking by hacker is analyzed which is basically divided into several phases of scouting, scanning, attacking, holding access privilege and deleting trace. The research on system vulnerability is briefly analyzed, and the methodology of hunting system vulnerabilities is also described which includes source code auditing, disassembly, debugging, network traffic analysis, black-box security testing, basic principal analysis and analogy. Some integrated measures on security management is also given to enforce the system security at the last.