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随着网络技术的高速发展,个人和企业将越来越多地把业务活动放到网络上,因此网络的安全问题就更加关键和重要。据统计,在全球范围内,由于信息系统的脆弱性而导致的经济损失,每年达数十亿美元,并且呈逐年上升的趋势。利用数字证书、PKI、对称加密算法、数字签名、数字信封等加密技术,可以建立起安全程度极高的身份认证系统,确保网上信息有效、安全地进行,从而使信息除发送方和接收方外,不被其他方知悉(保密性);保证传输过程中不被篡改(完整性和一致性);发送方确信接收方不是假冒的(身份的真实性和不可伪装性);发送方不能否认自己的发送行为(不可抵赖性)。
With the rapid development of network technology, individuals and enterprises will increasingly put their business activities on the network. Therefore, the network security issues become more and more crucial and important. According to statistics, the global economic losses caused by the fragility of information systems have reached billions of dollars each year and are on the rise year by year. The use of digital certificates, PKI, symmetric encryption algorithms, digital signatures, digital envelopes and other encryption technology, you can establish a highly secure identity authentication system to ensure that online information effectively and safely, so that the information in addition to the sender and receiver outside , Not to be known to other parties (confidentiality); to ensure that the transmission is not tampered with (integrity and consistency); that the sender is convinced that the receiver is not fake (authenticity and non-disguise of identity); that the sender can not deny Sending behavior (non-repudiation).