Enkripsi dan Dekripsi Pesan Menggunakan Polinomial Galois Field dengan Algoritma Hill Cipher

An information is extremely easy to obtain when technology evolving so fast and it important secure the avoid irresponsible parties who want abuse it. Messages that are not safe will harm owner of message, therefore a lot research related message security. This study aims deepen security in encoded form using Galois Field polynomials with one symmetric encryption algorithms, namely Hill Cipher algorithm. Encryption process converting into secret code while decryption reverse process. The this discussion carried out by changing character polynomial form, then operating calculations based on algorithm, results calculation operations again. Based modifications have been made, formulas be multiplied modulo form. In study, keys matrix elements members result random 256 characters binary bit-8. From research, we gain insight encoding can done which used later other forms encoding.