For example, the preimage of 4, 9 under the squaring function is the set −3,−2,+2,+3.
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Preimage attack — In cryptography, a preimage attack on a cryptographic hash is an attempt to find a message that has a specific hash value. There are two types of preimage attacks:* First preimage attack : given a hash h , find a message m such that hash(m) = h … Wikipedia
Preimage-Angriff — Urbild Angriffe (auch engl. preimage attack) sind Angriffe auf eine kryptologische Hashfunktion mit dem Ziel, zu einem gegebenen Hash einer unbekannten Nachricht (Erstes Urbild Angriff, auch engl. first preimage attack) oder zu einer gegebenen… … Deutsch Wikipedia
Preimage theorem — In mathematics, particularly in differential topology, the preimage theorem is a theorem concerning the preimage of particular points in a manifold under the action of a smooth map.tatement of Theorem Definition. Let f: X o Y,! be a smooth map… … Wikipedia
Préimage — Antécédent (mathématiques) Pour les articles homonymes, voir Antécédent. Sommaire 1 Définition 1.1 Exemples 2 … Wikipédia en Français
preimage — n. * * * … Universalium
preimage — n … Useful english dictionary
One-way compression function — In cryptography, a one way compression function is a function that transforms two fixed length inputs to an output of the same size as one of the inputs. The transformation is one way , meaning that it is difficult given a particular output to… … Wikipedia
Function (mathematics) — f(x) redirects here. For the band, see f(x) (band). Graph of example function, In mathematics, a function associates one quantity, the a … Wikipedia
Implementation of mathematics in set theory — This article examines the implementation of mathematical concepts in set theory. The implementation of a number of basic mathematical concepts is carried out in parallel in ZFC (the dominant set theory) and in NFU, the version of Quine s New… … Wikipedia
Image (mathematics) — In mathematics, the image of a preimage under a given function is the set of all possible function outputs when taking each element of the preimage, successively, as the function s argument. DefinitionIf f : X → Y is a function from set X to set… … Wikipedia
