The implementation of trithemius algorithm and modified least significant bit (mlsb) blue channel for bitmap image security
Sri Melvani Hardi, Dian Rachmawati, Annastasya Nabila Elsa Wulandari, Ivan Jaya, Jos Timanta Tarigan · Journal of Physics Conference Series · 2019
Abstract In the delivery of information confidentiality message is one of the things that are very important, because the image data is very span to the actions of computer crimes such as modified or stolen. The combination of cryptography and steganography can be one solution to prevent such crime. Here the author uses the Trithemius algorithm. Trithemius algorithm is a symmetric algorithm that has advantages that is in the process of encryption or decryption of symmetric cryptography takes a short time and key size relatively shorter. While the weakness is the key must be changed frequently, every time implementing communication for the security of the message so that the authors combine with steganography technique that is Modified Least Significant Bit (MLSB), so that messages will be inserted not visible clearly or visible. In this research, the message or image file will be sent is first encrypted with Trithemius cryptography algorithm, then encryption result will be hidden in an image file with bitmap format using Blue Channel MLSB steganography method. Then do the process of extraction of messages for further decryption to return to the original message as before.