Indian Journal of Science and Technology

Abstract

Advances in the digital content transmission have increased exponentially in the past few years. In addition, the video encryption plays an important role in guaranteeing data transmission security, this role is increasing continuously due to its involvement with the development of multimedia technology. In this paper, we propose applicable and secure video encryption algorithm. The proposed algorithm is mainly based on the symmetric key cryptographic technique, and it employs the audio sample to eliminate the need for trusted third party for key exchange process. The new algorithm starts working by splitting the undertaken video into audio samples and video frames. Next, the audio sample is used to generate the public key. The yielded audio sample and video frame are then encrypted along with the generated public key to produce the cipher data. The public key is then added to the cipher data randomly. The receiver on other side will extract firstly the public key from cipher data, and then complete the decryption process. Based on the results, and comparing with the existing encryption algorithms, the presented algorithm is able to maximize the tolerance skew value to be close to the optimal value. Moreover, the results showed that the proposed algorithm is efficient, and give high performance. The performance is measured by means of parameters such as Peak Signal to Noise Ratio (PSNR) and Mean Squared Error (MSE). The resulted MES values are close to zero, and the resulted values for the PSNR are between 30 and 58 dB, and those values proved the effectiveness of the proposed algorithm.

Keywords: Cryptography, Compression, Skew Tolerances, Video Encryption, Video Decryption