A.商流 B.物流 C.信息流 D.服務(wù)流
A.智慧財(cái)產(chǎn)權(quán) B.著作權(quán) C.商標(biāo) D.專利
A.對(duì)稱式加密法(Symmetric Encryption) B.非對(duì)稱式加密法(Asymmetric Encryption) C.數(shù)位簽章(Digital Signature) D.碎映函式(Hash Function)