计算机术语“perfect secrecy”的中英文意思、释义、翻译及用法-计算机英汉双解词典

术语	perfect secrecy
释义	perfect secrecy 完全保密 In information theory, a condition defined by the situation in which the conditional probability that the plaintext message P was sent, if ciphertext message C was received, is equal to the probability that plaintext Pwas transmitted. Thus receipt of the ciphertext message provides no additional information, to an attacker, on the nature of the ciphertext message. A necessary and sufficient condition for perfect secrecy is that for all plaintext message P, the conditional probability that ciphertext C was received, given that P was transmitted, is equal to the unconditional probability that ciphertext C was received. 在信息理论中,由如下情形所确定的一种状态:如果收到密文C,则发出明文P的条件概率等于传送明文P的概率。这样,收到的密文信息对攻击者来说没有任何附加信息。完全保密的充分必要条件是对所有明文信息P来说,如果P被传送了,则收到密文C的条件概率等于收到密文C的无条件概率。
随便看	APT APT Ⅲ arbitrary access arbitrary sequence computer arbitration architectural design architecture archive archived file archive file archiving area area mat area protection area search area variable arena argument argument list argument passing arithmetical instruction arithmetic and logic unit arithmetic assignment statement arithmetic check arithmetic constant

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