Kombinasi Kriptografi Hill Cipher-CBC dan Steganografi DCT untuk Pengamanan Pesan pada Citra Digital
DOI:
https://doi.org/10.17509/mkm9g193Keywords:
DCT, Hill Cipher, CBC, PSNRAbstract
Data security has become an urgent necessity in today's digital information exchange. This research proposes a secret message protection scheme through a combination of cryptography and steganography using Python. The Hill Cipher algorithm with Cipher Block Chaining (CBC) mode of operation is applied to encrypt the message into ciphertext, which is subsequently embedded into a digital image using the Discrete Cosine Transform (DCT) steganography technique. The test results show that the secret message was successfully embedded without being visually detectable. Quality measurement of the stego-image through PSNR testing produced values in the range of 50 dB across all trial data, indicating that the output image has good quality and closely resembles the original cover-image. These findings demonstrate that the integration of Hill Cipher-CBC and DCT is effective for message security.
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Copyright (c) 2026 Giani Alifia, Rini Marwati, Isnie Yusnitha (Author)
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