例句與造句

1. A cryptosystem is considered " secure in terms of indistinguishability " if no adversary, given an encryption of a message randomly chosen from a two-element message space determined by the adversary, can identify the message choice with probability significantly better than that of random guessing ( ).
2. (Here, is the self-information, which is the entropy contribution of an individual message, and is the expected value . ) A property of entropy is that it is maximized when all the messages in the message space are equiprobable; i . e ., most unpredictable, in which case.
3. It's difficult to find message space in a sentence. 用message space造句挺難的
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