New Definition of Small Message Criterion and Its Application in Transaction Covert Channel Mitigating
短消息指标新定义及在事务信道限制中的应用

Small Message Criterion (SMC) can measure the capability of the covert channel on transmitting small messages and is a necessary complement to the capacity criterion. However, SMC's present definition has deficiencies. The acquirement of message length proved to be hard in the common information system. Mitigating mechanism can not simultaneously satisfy the two restrictions of message transfer time and fidelity. The criterion does not cover information of message's sensitivity. At first, the value function...