推荐理由:全球信息安全威胁的新形势、新变化。近年,网络与信息安全面临的威胁发生了新变化、产生了新特征。信息安全面临威胁的种类和形式正在以几何级数的速度进行增长,已经超过以往历史的总和;威胁的性质和技术含量也远远超过以往 Recommended reason: the new situation of global information security threats, new changes. In recent years, threats to the network and information security have undergone new changes and new characteristics have emerged. The types and forms of threats to information security are growing at a geometric progression faster than the sum of their past histories; the nature and technological content of the threat is far greater than in the past