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In the following essay, each blank has four choices. Choose the most suitable one from the four choices and write down in the an
In the following essay, each blank has four choices. Choose the most suitable one from the four choices and write down in the an
admin
2009-02-15
38
问题
In the following essay, each blank has four choices. Choose the most suitable one from the four choices and write down in the answer sheet. There are two types of key technology: private key and public key. Private-key encryption methods are called(71)ciphers, information is encrypted with(72)both the sender and receiver hold privately. Public-key encryption methods are called(73)ciphers,(74)created for each user, encryption key and decryption key are(75)
选项
A、two related keys are
B、a key is
C、two unrelated keys are
D、three keys are
答案
A
解析
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