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...Journal of physics conference series paper open access generation rectangular matrix key for hill cipher algorithm using playfair to cite this article tuti alawiyah et al j phys conf ser view the online updates and enhancements content was downloaded from ip address on at icaisd iop publishing doi agung baitul hikmah wildan wiguna mira kusmira herlan sutisna bambang kelana simpony sistem informasi kampus kota tasikmalaya universitas bina sarana informatika jawa barat indonesia stmik nusa mandiri jakarta e mail tah bsi ac id abstract is a cryptographic that uses as by utilizing modulo operations used usually made randomly square in study created use makes it easy users remember matrices while remaining safe when distributed beside security produces longer more complicated ciphertext nd linear equation introduction current technology us exchange data but also accompanied ease others retrieve exchanged therefore need eective must protect being cryptography widely so cannot be read other p...