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trapdoor

Pronunciation: /ˈtræpdɔː/

The English word “trapdoor” has 7 meanings listed here.

noun

  1. A hinged or sliding door set into a floor or ceiling.
  2. Such a trap set into the floor of a stage to allow fast exits and entrances.
  3. A secret method of obtaining access to a program or online system; a backdoor.
  4. The special information that permits the inverse of a trapdoor function to be easily computed.
  5. A door in a level for regulating the ventilating current; a weather door.

verb

  1. To subvert (a cryptographic scheme) by means of a secret parameter that makes the trapdoor function easy to compute.
  2. To form a trapdoor deformity.

Etymology

From trap + door.

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Definitions are from Wiktionary, extracted by Kaikki.org, and are available under the CC BY-SA 4.0 licence.