2. 计算机
  3. All three types of cryptography schemes have unique function mapping to specific applications．For example，the symmetric key(1)ap

All three types of cryptography schemes have unique function mapping to specific applications．For example，the symmetric key(1)ap

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问题 All three types of cryptography schemes have unique function mapping to specific applications．For example，the symmetric key(1)approach is typically used for the encryption of data providing(2)，whereas asymmetric key cryptography is mainly used in key(3)and nonrepudiation，thereby providing confidentiality and authentication．The hash(4)(noncryptic)，on the other hand，does not provide confidentiality but provides message integrity,and cryptographic hash algorithms provide message (5)and identity of peers during transport over insecure channels．
(3)
选项 A、authentication
B、structure
C、encryption
D、exchange
答案D
解析
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