= Pseudorandom permutation
{wiki=Pseudorandom_permutation}
A pseudorandom permutation is a mathematical construct used in cryptography and computer science, which serves to mimic the properties of a truly random permutation. A permutation is a rearrangement of elements in a specific order, and a pseudorandom permutation has two main characteristics: 1. **Deterministic**: A pseudorandom permutation is created by a specific algorithm that takes an input (the key) and generates a fixed permutation of the input data.
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