What is the meaning of Trapdoor?
A hinged or sliding door set into a floor or ceiling.
Such a trap set into the floor of a stage to allow fast exits and entrances.
A secret method of obtaining access to a program or online system; a backdoor.
The special information that permits the inverse of a trapdoor function to be easily computed.
A door in a level for regulating the ventilating current; a weather door.
To subvert (a cryptographic scheme) by means of a secret parameter that makes the trapdoor function easy to compute.
To form a trapdoor deformity.
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