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trapdoor function
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trapdoor function
noun Mathematics.
a function defined from data by means of a mathematical procedure in such a way that it is easy to obtain the function when the data are known, but when the procedure and data are not known it becomes very difficult to determine the original data: used in cryptography, where the data are the characters of the plain text, or message, and the trapdoor function is the cryptogram.
Origin:
1975–80; by analogy with a trapdoor in a floor, through which it is easier to fall than to reemerge after a fall
1975–80; by analogy with a trapdoor in a floor, through which it is easier to fall than to reemerge after a fall
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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Based on the Random House Dictionary, © Random House, Inc. 2012.
Cite This Source
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Trapdoor function
is always a great word to know.
So is calculus. Does it mean:
| one of several highly systematic methods of treating problems by a special system of algebraic notations, such as differential or integral calculus |
| the method of finding the fourth term in a proportion when three terms are given |
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