Secure Transmission of Data using Audio Steganography and Cryptography

Kumar, Manmeet (2022) Secure Transmission of Data using Audio Steganography and Cryptography. Masters thesis, Dublin, National College of Ireland.

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Abstract

Digital information such as images, text, and audio are shared through networks in this age of technology. This data transmission over the internet is vulnerable to eavesdropper interception and improper manipulation. So, security of data has become a prominent subject of research. Much study has gone into finding the best solution for text secrecy, integrity, and dependability. Audio steganography is one such approach for securely conveying or hiding sensitive data. Audio steganography is used to conceal critical info by embedding it in an audio recording. In this research study, a system is implemented that combines encryption of data and audio steganography to keep the confidentiality and integrity of exchanged data. Here, a system is implemented in which the secret data is firstly encrypted, and then the cipher data is incorporated inside an audio track by using the LSB (Least Significant Bit) technique. This study also examines how well-known encryption algorithms (AES-256, Twofish, Blowfish, and Triple DES), as well as how files of different file types & sizes (txt, docx, pdf, and jpg) affect the PSNR value. The proposed system is assessed and tested by computing the MSE (Mean Square Error) and PSNR (Peak Signal to Noise Ratio). Spectrogram is used for visual evaluation of audio files to evaluate if the secret data hidden in the audio cover file affects the frequencies present in the audio files. The results reveal that there is no noticeable distortion when the encrypted files are buried inside the cover audio file. Also, different file types have noticeable impact on the PSNR value than different encryption algorithms.

Item Type:	Thesis (Masters)
Supervisors:	Name Email Moldovan, Arghir-Nicolae UNSPECIFIED
Uncontrolled Keywords:	Audio Steganography; LSB encoding; Encryption; File types; PSNR
Subjects:	Q Science > QA Mathematics > Electronic computers. Computer science T Technology > T Technology (General) > Information Technology > Electronic computers. Computer science Q Science > QA Mathematics > Computer software > Computer Security T Technology > T Technology (General) > Information Technology > Computer software > Computer Security T Technology > TK Electrical engineering. Electronics. Nuclear engineering > Multimedia Communications
Divisions:	School of Computing > Master of Science in Cyber Security
Depositing User:	Tamara Malone
Date Deposited:	28 Apr 2023 15:49
Last Modified:	28 Apr 2023 15:49
URI:	https://norma.ncirl.ie/id/eprint/6526

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