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Substitution–permutation network

cipher design construction

Pronunciation
/sʌbstɪˈtjuːʃn – pəːmjʊˈteɪʃən ˈnɛtwəːk/
/ˌsəbstɪˈtjuʃən – ˌpərmjʊˈteɪʃən ˈnɛtˌwərk/