由于MAC的计算要比数字签名快，因此它对于诸如ssl等数据传输量很大的传输层安全性来说是实用的。
Because a MAC can be computed faster than a digital signature, it is practical for transport layer security like SSL, where a large volume of data is transmitted.
因为仅仅有数字签名并无法保证发送方就是他们自己所声称的人，消息的传输很容易遭受恶意第三方诸如再现攻击等技术的袭击。
Because a signature alone does not guarantee that the sender is who they say they are, the message transmission is vulnerable to techniques such as replay attacks by some malicious third party.
系统开发涉及身份验证、数字签名与传输加密、工作流定义、审批应用、电子签章和痕迹跟踪等关键安全技术。
Many key security technologies are involved, such as ID authentication, digital signature and transfer encryption, workflow definition, accreditation application, electronic seal and trail trace.
应用推荐