为了防范黑客攻击、保护网络并解决网络安全问题，各研究机构投入了大量的人力和物力，研究开发各种软件工具，使很多安全防护技术迅速发展起来，如：防火墙、入侵侦测、病毒防护、身份认证、抗毁、灾难恢复等。我国信息安全产业的发展也以高强度密码算法和防火墙为龙头，初具 In order to prevent hacker attacks, protect the network and solve network security problems, research institutes have invested a great deal of manpower and material resources in research and development of various software tools to rapidly develop many security technologies such as firewalls, intrusion detection and virus protection , Authentication, anti-destruction, disaster recovery and so on. The development of China’s information security industry is also based on high-strength cryptographic algorithms and firewall as a leader, beginning with