【正文】
________ is also needed. The receiver needs to be sure of the sender’s identity.A、encryptionB、authorizationC、authenticationD、encapsulation 第一題、單項(xiàng)選擇題(每題1分,5道題共5分) 答完題后,請(qǐng)一定要單擊下面的“交卷”按鈕交卷,否則無法記錄本試卷的成績。《計(jì)算機(jī)專業(yè)英語》第13章在線測試剩余時(shí)間:59:53窗體頂端答題須知:本卷滿分20分。 在交卷之前,不要刷新本網(wǎng)頁,否則你的答題結(jié)果將會(huì)被清空。Confidentiality of the message is not enough in a secure munication。The data, when they are n