信息安全的目标 (5)不可抵赖性(Non-Repudiation): protection against denial by one of the parties in a communication. Origin non-repudiation:proofthat the message was sent by the specified party. Destination non-repudiation:proofthat the message was received by the specified party. 一般通过数字签名（digital signature)来提供不可抵赖性服务。信息安全的目标  （5）不可抵赖性（Non-Repudiation）：  protection against denial by one of the parties in a communication.  Origin non-repudiation：proof that the message was sent by the specified party.  Destination non-repudiation：proof that the message was received by the specified party. 一般通过数字签名（digital signature）来提供不可抵赖性服务