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Affine Mapping

Definition

An affine mapping is a mathematical operation that transforms points in a geometric space while keeping lines straight. In cryptographic contexts, this refers to a linear transformation followed by a translation, a fundamental component in certain encryption algorithms and hash functions. Such mappings ensure data transformations are predictable and reversible under specific conditions, which is vital for secure data processing. The application of affine transformations can contribute to the diffusion property within block ciphers, distributing input bit changes widely across the output.