单项选择题

Which option ensures that data is not modified in transit？（）

A.Authorization
B.Confidentiality
C.Authentication
D.Integrity

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单项选择题

A.signature-based
B.profile-based
C.rule-based
D.protocol analysis-based

单项选择题

A.2048 bits
B.1024 bits
C.256 bits
D.512 bits