Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun The set of arguments of a function corresponding to a particular subset of the range.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun mathematics The set containing exactly every member of the
domain of afunction such that the member is mapped by the function onto an element of a given subset of the codomain of the function. Formally, of a subset B of the codomain Y under a function ƒ, the subset of the domain X defined by
Etymologies
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Examples
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The functions are different from cryptographic hash functions, because they should be much faster and don't need to be resistant to preimage attack.
SSWUG.ORG Articles 2009
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A preimage collision on MD5 (as requested in the article) is quite difficult.
doggdot.us 2008
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A preimage collision on MD5 (as requested in the article) is quite difficult.
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Currently the strength of our standard digest algorithms (SHA-x) against preimage attacks is roughly that of the output length, and against collision attacks it's something less than half the output length (this is a topic of active research on SHA-1, which currently stands at
Educated Guesswork 2009
leaden commented on the word preimage
“. . . The subset . . . defined by . . .”? Well? (The suspense is killing me.)
Continues [obsessively refreshing the page]
November 9, 2011