Pikeun manggihan sabalikna tina matriks 2x2 dina cipher bukit ngagunakeun mod 26, Anjeun bisa make léngkah di handap ieu: 1. Ngitung determinan matriks. Lamun determinan teu relatif prim ka 26 (ie, gcd(determinan, 26)!= 1), mangka matriks teu boga sabalikna. 2. Ngitung matriks kofaktor ku swapping posisi unsur dina diagonal utama, sarta ngarobah tanda unsur ti diagonal utama. 3. Transpose matrix kofaktor. 4. Multiply matrix transposed of cofactors ku sabalikna tina modulo 26. Pikeun manggihan sabalikna tina modulo 26, Anjeun bisa ngagunakeun algoritma Euclidean. Modul matrix nu dimodulkeun mangrupa matrix hasilna sanggeus léngkah 4, jadi anjeun kudu ngajawab pertanyaan matrix 4. Lamun anjeun teu bisa manggihan sabalikna tina matrix determinant 26.
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