根据密码分析者可利用的数据资源来分类,可将密码攻击的类型分为四类,其中密码分析者能够选择密文并获得相应明文的攻击密码的类型属于()
A、仅知密文攻击B
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AsfarasAustraliancultureisconcerned,thehistoryofAustraliacanbedividedintothefollowingphaseswiththeexceptionof________.
Towriteuphisnovel,Johnislookingforanenvironmentfree________outsidedistraction.
OxfordAdvancedLearnersDictionary’,3rdEdition(1980),isamongthebest-knownBritish______dictionaries.
句子写作:Youalwaysremainavictim
IntheUnitedKingdom,thepartywhichwinsthe________numberofseatsintheHouseofCommonsbecomestheofficialOpposition.