单项选择题
Birthday attacks are used against which of the following？（）
A. digital signatures B. symmetric ciphering C. hashalgoritms D. asymmetric ciphering E. digital certificates
单项选择题 Whichofthefollowingstatementsiscorrectregardingahybridcryptosystem？（）
多项选择题 WhenconfiguringIOSfirewall（CBAC）operationsonCiscorouters，the"inspectionrule"couldbeappliedatwhichtwolocations？（）
多项选择题 TheCS-MARSapplianceoffersattackmitigatonsusingwhichtwomethods？（）
