Penerapan Steganography Untuk Perlindungan Hak Cipta Menggunakan Metode Least Significant Bit (LSB)

Lontar as one of the manuscripts (ancient manuscripts) which is the cultural heritage of the ancestors which is unique in recording and transferring traditional knowledge which is done through writing in the Lontar media. However, the slow pace of ejection made the manuscript very vulnerable for various reasons. The damage resulted in an increase in the information contained in Lontar, then the media was converted to digital. If these various types of letters are digitized, what will be the proof of authenticity that these lontar scripts are His? In addition, this digitization can also be used to develop access for triplets and the general public to their knowledge. From these problems, this research was conducted to build a desktop-based application that implements steganography by hiding secret messages into the PNG extension by utilizing the Least Significant Bit (LSB) method as a means of copyright protection in the Balinese Lontar Manuscript. This research succeeded in doing the insertion only with the last 3-2-3 bit formation in the RGB channel, so between the cover image and the stegoimage there will be no significant difference to the human sense of sight even though the inserted message is 100% of the maximum capacity of the image. The test results prove that there is an increase in security and the imperceptibility value is maintained. This is evidenced by the results of the average MSE value of 0.01856775 dB and PSNR 97.22405 dB. Then the user who first encrypts the file has definitive proof of copyright ownership and data security. Keywords: Steganography, Least Significant Bitf (LSB), Mean Square Error (MSE), Peak Signal to Noise Ratio (PSNR)