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A trapdoor or hatch is a sliding or hinged door that is flush with the surface of a floor, ceiling, or roof. [1] It is traditionally small in size. [ 2 ] It was invented to facilitate the hoisting of grain up through mills, however, its list of uses has grown over time. [ 3 ]
The concept of public key cryptography was introduced by Whitfield Diffie and Martin Hellman in 1976. [3] At that time they proposed the general concept of a "trap-door one-way function", a function whose inverse is computationally infeasible to calculate without some secret "trap-door information"; but they had not yet found a practical example of such a function.
Others are much simpler; for example, a trapdoor hidden under a rug. Some buildings have secret areas built into their original plans, such as secret passages in medieval castles, designed to allow inhabitants to escape from enemy sieges. Other castles' secret passages led to an underground water source, providing water during prolonged sieges.
Searching may uncover a hidden member of the club, a key, secret code or trapdoor to assist in navigation across the Mansion. [3] [4] Occasionally, searching will make a monster named The Monsta appear behind windows or doors and chase the player, requiring them to leave the room to avoid being caught and ending the game.
Hidden Fields Equations (HFE), also known as HFE trapdoor function, is a public key cryptosystem which was introduced at Eurocrypt in 1996 and proposed by (in French) Jacques Patarin following the idea of the Matsumoto and Imai system.
Police in Grass Valley arrested 15 people Friday morning after finding guns, drugs and a trap door in a room at. Cars may pass by everyday, but what went down behind closed doors at the Holiday ...
The Rabin trapdoor function has the advantage that inverting it has been mathematically proven to be as hard as factoring integers, while there is no such proof known for the RSA trapdoor function. It has the disadvantage that each output of the Rabin function can be generated by any of four possible inputs; if each output is a ciphertext ...
EPOC-3 uses the Okamoto–Uchiyama one-way trapdoor function and two random functions (hash functions) as well as any symmetric encryption scheme such as the one-time pad, or any classical block cipher. EPOC-1 is designed for key distribution; EPOC-2 and EPOC-3 are designed for both key distribution and encrypted data transfer.