Digital Image Data Security Using MATLAB -Based AES-128 Algorithm

Mazayah Tsaqofah; Juwita Sari; Nurhidayati; Adinda Tarisyah Hsb; Rizky Abdillah; Mrs. Rusdi

doi:10.59934/jaiea.v5i2.2089

Authors

Mazayah Tsaqofah Universitas Islam Negeri Sumatera Utara
Juwita Sari Universitas Islam Negeri Sumatera Utara
Nurhidayati Universitas Islam Negeri Sumatera Utara
Adinda Tarisyah Hsb Universitas Islam Negeri Sumatera Utara
Rizky Abdillah Universitas Islam Negri Sumatera Utara
Mrs. Rusdi Universitas Islam Negri Sumatera Utara

DOI:

https://doi.org/10.59934/jaiea.v5i2.2089

Keywords:

AES-128, Digital Image, Encryption, Decryption, Matlab

Abstract

Digital images are widely used for storing and transmitting sensitive information , so that aspect data security is becoming very important. This research discuss digital image data security using the Advanced Encryption Standard (AES) algorithm with a long key 128 bit implemented in MATLAB environment. The method used is cryptography . symmetric , where the encryption and decryption processes use a key the same secret . The encryption process done to randomize the pixel value of the original image so that visual information cannot be recognized , while the decryption process aim return image encrypted to condition back to the beginning without data changes . System evaluation done through histogram analysis , process time measurement , and evaluation quality image using the Mean Squared Error (MSE) and Peak Signal-to-Noise Ratio (PSNR) parameters. The test results show that The encrypted image has a random histogram pattern and does not resemble original image . In addition that , the decryption process produce MSE value of zero and PSNR value not finite , which indicates the absence of lost information . Thus , it can concluded that the MATLAB -based AES-128 algorithm is effective and reliable in improving the security of digital image data .

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