returns a row for each symmetric key encryption specified by using the encryption by clause of the create symmetric key statement 為使用createsymmetrickey語(yǔ)句的encryptionby子句指定的每個(gè)對(duì)稱密鑰加密返回一行。
to secure the data transferred on the network, this system applies the mechanism similar to ssl ( secure socket layer ) and combines the symmetric key encryption and asymmetric key encryption, so as to protects the data transferred on the network 能夠設(shè)定免費(fèi)的時(shí)段,這些時(shí)段用于教學(xué),不計(jì)費(fèi)??梢詫?duì)機(jī)房?jī)?nèi)的每臺(tái)計(jì)算機(jī)單獨(dú)設(shè)置費(fèi)率標(biāo)準(zhǔn)。同時(shí),為了節(jié)省能源,系統(tǒng)可以自動(dòng)遠(yuǎn)程關(guān)閉空閑的計(jì)算機(jī)。