Along with the development of information technology in meeting the needs, various adverse actions and difficult to avoid are emerging. One of such action is data theft. Therefore, this study will discuss about cryptography and steganography that aims to overcome these problems. This study will use the Modification Vigenere Cipher, Least Significant Bit and
Dictionary Based Compression methods. To determine the performance of study, Peak Signal to Noise Ratio (PSNR) method is used to measure objectively and Mean Opinion Score (MOS) method is used to measure subjectively, also, the performance of this study will be
compared to other method such as Spread Spectrum and Pixel Value differencing. Aftercomparing, it can be concluded that this study can provide better performance when compared to other methods (Spread Spectrum and Pixel Value Differencing) and has a range of MSE values (0.0191622- 0.05275) and PSNR (60.909 to 65.306) with a hidden file size of 18 kb
and has a MOS value range (4.214 to 4.722) or image quality that is approaching very good.
Rojali, Salman A. G and George. (2017). Website-Based PNG Image Steganography using the Modified Vigenere Cipher, Least Significant Bit, and Dictionary Based Compression Methods (SCOPUS). AIP Conference Proceedings, 1867 (1), 1-11.
Cryptography, Steganography, Modified Vigenere Cipher, Least Significant Bit, Dictionary Based Compression, Spread Spectrum, Pixel Value Differencing