trap-door

基本解释

My uncle Philip had very skillfully made a concealed trap-door.
我叔叔菲利普用他高超的技术做了一扇隐蔽的地板门。
dj.client.iciba.com
It is essential for a public-key encryption scheme to discover a one-way trap-door function.
构成一种公钥加密方案的关键是找到一个带陷门的单向函数。
Using the theorem of linear Diophantine equations and the Chinese remainder theorem, we have constructed a class of trap-door knapsack public-key cryptosystems, which have a better security.
利用不定方程理论及中国剩余定理，我们设计了一类陷门背包公开钥密码系统，它们具有更好的安全性。

Well, PC World has cracked open the trap-door on their HDTV testing lab to show everyone how they do it.
ENGADGET: So you want to test HDTVs, eh? HD
But as I watch Obama throw his past associates and current colleagues through the trap door, I see a cold-hearted pragmatist at work who will do what it takes to be successful.
FORBES: Obama's Cold Heart Might Be A Good Thing