根据美国联邦调查局和计算机安全协会的一项调查,每家企业网平均每年要被攻击12到15次,其中73％的企业网会被黑客成功进入。 对于某些企业网而言,98％的攻击不会被发现。即便对于安全措施严密的政府部门网络,也有70％的攻击不会被发现。 电子邮件炸弹和病毒攻击是非常容易发现的。有些计算机安全咨询公司经 According to a survey conducted by the FBI and the Computer Security Association, each corporate network is attacked on average 12 to 15 times a year, of which 73% of corporate networks are successfully entered by hackers. For some corporate networks, 98% of attacks will not be found. Even for a network of government agencies that have tight security measures, 70% of attacks will not be detected. Email bombs and virus attacks are very easy to spot. Some computer security consulting firm