back-door
英
美
- backed adj.有背的;有支持的动词back的过去式和过去分词形式.
- sand n.沙;沙子;沙滩;黄灰色vt.撒沙;打磨;以沙掩盖
名词 back door:
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a secret or underhand means of access (to a place or a position)
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an undocumented way to get access to a computer system or the data it contains
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an entrance at the rear of a building