This technique is known, somewhat informally, as the “foot in the door technique”.

这个技巧是大家熟知的，这种说法有点不正式，应该是“脚在门里技巧”

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This technique is in many ways the opposite of the Foot in the Door.

这个技巧在很多方面与脚在门里技巧相反。

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Often, programmers will leave the door open to attacks by using poor technique, like not strictly defining the types of data they expect as input to Web services.

通常，程序员会为使用拙劣技术进行的攻击留下后门，如没有严格地定义Web服务所需的输入数据的类型。

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This door-to-door technique can make the difference in finding someone in hours, days or years.

CNN: Missing persons could be just next door

Then there's another technique that I call the "side door" approach.

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