unicity distance - определение. Что такое unicity distance
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Что (кто) такое unicity distance - определение


Unicity distance         
AMOUNT OF CIPHERTEXT NEEDED TO UNAMBIGUOUSLY BREAK AN ENCRYPTION SYSTEM
Spurious key
In cryptography, unicity distance is the length of an original ciphertext needed to break the cipher by reducing the number of possible spurious keys to zero in a brute force attack. That is, after trying every possible key, there should be just one decipherment that makes sense, i.
Distance         
  • The distances between these three sets do not satisfy the triangle inequality:<math display="block">d(A,B)>d(A,C)+d(C,B)</math>
  • Distance along a path compared with displacement.  The Euclidean distance is the length of the displacement vector.
  • Airline routes between [[Los Angeles]] and [[Tokyo]] approximately follow a direct [[great circle]] route (top), but use the [[jet stream]] (bottom) when heading eastwards. The shortest route appears as a curve rather than a straight line because the [[map projection]] does not scale all distances equally compared to the real spherical surface of the Earth.
  • [[Manhattan distance]] on a grid
LENGTH OF STRAIGHT LINE THAT CONNECTS TWO POINTS IN A MEASURABLE SPACE OR IN AN OBSERVABLE PHYSICAL SPACE
Distances; Distance Formula; Distance in time; Time distance; Directed distance; Distance traveled; Oriented distance; Distance (mathematics); Distance between sets
·noun Remoteness of place; a remote place.
II. Distance ·vt To place at a distance or remotely.
III. Distance ·noun Space between two antagonists in fencing.
IV. Distance ·noun Ideal disjunction; discrepancy; contrariety.
V. Distance ·noun A space marked out in the last part of a race course.
VI. Distance ·vt To cause to appear as if at a distance; to make seem remote.
VII. Distance ·noun The interval between two notes; as, the distance of a fourth or seventh.
VIII. Distance ·noun Length or interval of time; period, past or future, between two eras or events.
IX. Distance ·noun The remoteness or reserve which respect requires; hence, respect; ceremoniousness.
X. Distance ·noun A withholding of intimacy; alienation; coldness; disagreement; variance; restraint; reserve.
XI. Distance ·noun Remoteness in succession or relation; as, the distance between a descendant and his ancestor.
XII. Distance ·vt To outstrip by as much as a distance (see Distance, ·noun, 3); to leave far behind; to surpass greatly.
XIII. Distance ·noun The part of a picture which contains the representation of those objects which are the farthest away, ·esp. in a landscape.
XIV. Distance ·noun Relative space, between troops in ranks, measured from front to rear;
- contrasted with interval, which is measured from right to left.
XV. Distance ·noun The space between two objects; the length of a line, especially the shortest line joining two points or things that are separate; measure of separation in place.
distance         
  • The distances between these three sets do not satisfy the triangle inequality:<math display="block">d(A,B)>d(A,C)+d(C,B)</math>
  • Distance along a path compared with displacement.  The Euclidean distance is the length of the displacement vector.
  • Airline routes between [[Los Angeles]] and [[Tokyo]] approximately follow a direct [[great circle]] route (top), but use the [[jet stream]] (bottom) when heading eastwards. The shortest route appears as a curve rather than a straight line because the [[map projection]] does not scale all distances equally compared to the real spherical surface of the Earth.
  • [[Manhattan distance]] on a grid
LENGTH OF STRAIGHT LINE THAT CONNECTS TWO POINTS IN A MEASURABLE SPACE OR IN AN OBSERVABLE PHYSICAL SPACE
Distances; Distance Formula; Distance in time; Time distance; Directed distance; Distance traveled; Oriented distance; Distance (mathematics); Distance between sets
¦ noun
1. the length of the space between two points: I cycled the short distance home.
2. the condition of being remote.
a far-off point.
3. the full length of a race or other contest.
Brit. Horse Racing a space of more than twenty lengths between two finishers in a race.
(the distance) Brit. Horse Racing a length of 240 yards from the winning post on a racecourse.
4. an interval of time.
5. aloofness or reserve.
¦ verb make distant.
?(often distance oneself from) dissociate or separate.
Phrases
go the distance last or continue to participate until the scheduled end of a contest.
keep one's distance stay far away.
?maintain one's reserve.
Origin
ME (in the sense 'discord, debate'): from OFr. or from L. distantia, from distant-, distare (see distant).