Multimedia Encryption Using Rubik’s Cube-Inspired Algorithm: A Novel Approach to Audio and Image Security

This paper presents a fast and secure image and audio encryption scheme based on the principles of a Rubik’s Cube. The proposed method combines scrambling and XOR-based diffusion to ensure confidentiality during storage and transmission. Multimedia data are converted into matrix representations and permuted using randomly generated row and column secret keys. Circular shift operations are applied based on the parity of the key values to achieve effective confusion and diffusion. This paper highlights the application of rubric cube algorithm applied on audio data for the first time for encryption and decryption process for voice biometric system design. The experimental results are also presented on par to image data with execution time. Audio data is processed and modelled as a three-dimensional Rubik’s Cube and scrambled cube using random rotational transformations. Decryption is performed using inverse operations with identical keys. Experimental results confirm strong security, low computational complexity, and high reconstruction accuracy, demonstrating suitability for secure multimedia communication