文章对信息安全问题的主要特点和趋势从其高度脆弱性和风险性、安全攻击源和防范对象的不确定性、信息空间活动主体的虚拟实在化、反传统的技术维度和复杂的“人-机”关系、网络世界的互联互动与全球“即时效应”、信息安全的不对称性和反传统的力量对比格局等诸多方面进行了阐述。 The main characteristics and trends of the article are as follows: from its high vulnerability and risk, the uncertainty of the source of security attack and the target of prevention, the virtual reality of the main body of information space activities, the anti-traditional technical dimension and the complicated “human- Machine ”relationship, interconnection and interaction in the online world and the global“ immediate effect ”, the asymmetry of information security and contrasting forces against traditional traditions.