This sketch by Leonardo da Vinci is known as' Masquerader in the Guise of a Prisoner 'and is taken from an old book of printed sketches by da Vinci.
这个素描是大家熟知的达芬奇的《囚徒扮演者》，来自于一本刊印达芬奇素描的旧书。
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In addition, the succeeded masquerader detection algorithm is proposed in this scheme. In this algorithm, the sink node monitors and examines the malicious region.