Penyisipan Audio Terenkripsi pada Citra dengan Discrete Wavelet Transform

• Main Authors: Mohammad Iqbal Maulana, Abduh Riski, Ahmad Kamsyakawuni
• Format: Article
• Language: English
• Published: Politeknik Ganesha Medan 2018-03-01
• Series: Sinkron
• Online Access: https://jurnal.polgan.ac.id/index.php/sinkron/article/view/98

Security of an audio message can use cryptography and steganography teqniques. Cryptography is a technique to secure important information in a message by using encyrption so the message can not be known by others (attacker). encrypted audio message is re-secured using steganography technique. Steganography is a technique of embedding a message into other media so that the existence of the message is not detected by other. In this research an International Data Encryption Algorithm (IDEA) is used as algorithm on cryptography process and Discrete Wavelet Transform (DWT) is used in steganography process. encrypted audio message will be inserted into the image using DWT method. Signal to Noise Ratio (SNR), Peak Signal to Noise Ratio (PSNR) and key sensitivity analysis are used to analyze the security of the proposed method. From the research result, encryption technique using IDEA algorithm in an audio message can be said good because IDEA has a sensitive key although the result of encryption process will cause the attacker's suspicion because it produces an unclear audio cipher, therefore it can be done next security technique that is steganography. The audio cipher of the encryption process will be inserted into an image using the DWT method, which from this study obtained a result if the insertion of the audio cipher into the image using DWT is good, because the image of the insertion result does not change significantly as shown from the more PSNR value of 40dB. Therefore, the security of audio messages using IDEA cryptographic techniques and continued with DWT steganography techniques is very good because an audio will have a double security level of cryptographic and steganographic processes.