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單項(xiàng)選擇題

Which of the following encryption methods is known to be unbreakable?下面哪一個(gè)加密算法被認(rèn)為是不可破解的?()

A.Elliptic Curve Cryptography.橢圓曲線加密
B.One-timepads.一次性隨機(jī)密鑰
C.Symmetric ciphers.對(duì)稱密鑰
D.DES codebooks.DES密碼本

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