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【单选题】
关于加密技术,下面的说法不正确的是:()A.
加密技术利用一定的加密算法，将明文转换为无意义的密文，阻止非法用户理解原始数据从而确保数据的保密性。
B.
由加密者和解密者使用的加解密可变参数叫密钥。
C.
加密技术可以分为对称密钥加密技术和非对称密钥加密技。
D.
加密技术属于物理范畴上的安全防范措施
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举一反三
【单选题】I hear one of my classmates America since 1980. [ ]
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C.
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D.
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confidentest
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A.
正确
B.
错误
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【单选题】I hear one of my classmates America since 1980. [ ]
A.
are from
B.
have gone to
C.
has lived in