What is Permutation?

Permutation definition and meaning on Dictionary terms:
the act of permuting or permutating; alteration; transformation.
Mathematics. the act of changing the order of elements arranged in a particular order, as abc into acb, bac, etc., or of arranging a number of elements in groups made up of equal numbers of the elements in different orders, as a and b in ab and ba; a one-to-one transformation of a set with a finite number of elements. any of the resulting arrangements or groups.Compare combination(def 8b).





Permutation definition in Computer Security terms:

Acronym(s): None

Definition(s): An ordered (re)arrangement of the elements of a (finite) set; a function that is both a one-to-one and onto mapping of a set to itself.
Source(s): NIST SP 800-133 (Superceded by Rev. 1)

An invertible function.
Source(s): NIST SP 800-38B
NIST SP 800-38D

Synonym(s): None


reference: CSRC Glossary