A.用ICQ或QQ和朋友聊天 B.上網(wǎng)瀏覽網(wǎng)頁(yè) C.網(wǎng)上購(gòu)物 D.從Internet下載或上傳文件
A.數(shù)據(jù)保密性(Data Confidentiality) B.授權(quán)(Authorization) C.驗(yàn)證(Authentication) D.數(shù)據(jù)一致性(Data Integrity) E.數(shù)據(jù)的不可否認(rèn)性(Data Nonrepudiation)