According to the systematical research on those, at present, commonly adapted attacking and intrusion means, it analyzes and studies all those active approaches, like electronic frauds, scanning loopholes, overflowing buffer area, DOS and DDOS, etc.

• 对目前较为流行的攻击方式与入侵方法进行了系统的研究，分析研究了电子欺骗、漏洞扫描、缓冲区溢出、DOS及DDOS等主动攻击方法。