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单选题
 All three types of cryptography schemes have unique function mapping to specific applications.For example, the symmetric key(71)approach is typically used for the encryption of data providing(72), whereas asymmetric key cryptography is mainly used in key(73)and nonrepudiation, thereby providing confidentiality and authentication. The hash(74)(noncryptic), on the other hand, does not provide confidentiality but provides message integrity, and cryptographic hash algorithms provide message(75)and identity of peers during transport over insecure channels.

 
问题1选项
A.cryptography
B.decode
C.privacy
D.security
问题2选项
A.conduction
B.confidence
C.confidentiality
D.connection
问题3选项
A.authentication
B.structure
C.encryption
D.exchange
问题4选项
A.algorithm
B.secure
C.structure
D.encryption
问题5选项
A.confidentiality
B.integrity
C.service
D.robustness
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