PENGAMANAN CITRA DENGAN ALGORITMA DIFFIE-HELLMAN DAN ALGORITMA SIMPLIFIED DATA ENCRYPTION STANDARD (S-DES)

ahmad Kamsyakawuni (Jurusan Matematika, FMIPA Universitas Jember)
Ahmad Husnan Fanani (Jurusan Matematika, FMIPA Universitas Jember)
abduh Riski (Jurusan Matematika, FMIPA Universitas Jember)

Jurnal Ilmiah Matematika dan Pendidikan Matematika (JMP)
Vol 10 No 2 (2018): Jurnal Ilmiah Matematika dan Pendidikan Matematika

Simplified Data Encryption Standard (S-DES) is a cryptographic algorithm whose data-disguise process is simple and fast enough compared to other algorithms. Because of its simplicity, the S-DES algorithm is vulnerable to statistical attacks when applied to imagery, so this study tries to minimize S-DES weaknesses in image data by modifying S-DES keys with Diffie-Hellman. Diffie-Hellman is one of the key generating algorithms and key exchange. This research uses image data that is RGB image and grayscale image. A modified S-DES key with Diffie-Hellman is then used to encrypt the image. This study also analyzed the security level of S-DES algorithm that the key has been modified with Diffie-Hellman.