Which mathematical concept forms the foundation of most modern retail payment encryption systems?

In today's digital retail landscape, cybersecurity has become increasingly mathematical in nature. From encryption algorithms to statistical threat detection, mathematics plays a crucial role in keeping customer data safe. This poll tests your knowledge about how mathematical concepts are applied in modern retail cybersecurity systems, revealing the fascinating intersection between abstract mathematics and practical retail protection.

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Prime factorization of large numbers
Fourier transform analysis
Bayesian probability networks
Euclidean geometric algorithms