نبذة مختصرة : The science of hiding messages in a media is an interesting science to learn. Inserting messages either in text, image, sound and video messages requires input in the form of digital files that will be inserted messages, messages to be inserted (message), and keys (keys). More MP3 are chosen for use than using image files. In hiding messages, a format that is more common is used will be chosen so as not to cause excessive suspicion. Encryption is very important in cryptography, is the security of the data sent to maintain its confidentiality. The type of data in writing this report is the data obtained from the literature study to obtain theoretical data that is used as supporting literature to support the research conducted. The source of the data obtained is primary data as a reference, in this case the author gets data from previous researchers that are related to the research that the author did. The steganography method used in this research is parity coding, which is inserting messages / information into the carrier media in the form of MP3 audio files by first being encrypted using cipher caesarean cryptography encryption technique, which is an algorithm with substitution techniques where each letter in the bright text (plaintext ) replaced by another letter that has a certain position difference in the alphabet. This research was made using Visual Basic.Net software. The results of this study in the form of data that has been encrypted using caesar cipher method and hidden into MP3 Audio File then extracted to get text messages and decrypted to get the original message contained in the mp3 file.
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