Permutation box

A **Permutation Box**, often abbreviated as P-box, is a fundamental concept used in the design of cryptographic algorithms, particularly in symmetric key cryptography. It is a tool used to perform a specific type of transformation that rearranges the bits of input data in a predefined way. ### Key Features of a Permutation Box: 1. **Rearrangement**: The primary function of a P-box is to take an input of bits and rearrange them to create an output of bits.