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( )是在密钥的控制之下,将定长的明文块转换成等长密文的技术
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( )是在密钥的控制之下,将定长的明文块转换成等长密文的技术
A、流密码
B、置换密码
C、代换密码
D、分组密码
时间：2021-09-01 23:46
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青书学堂
大连工业大学
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D
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( )是在密钥的控制之下,将定长的明文块转换成等长密文的技术
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已知A=40；B=30；C=100；D=50，逻辑“与”运算符为and，“或”运算符为or，“非”运算符为not。计算表达式（A>B+20）or（B+60
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