Quantum video encryption based on bitplanes and improved Arnold scrambling

Quantum video encryption is an essential method for ensuring video content security. This paper proposes a quantum video encryption method based on bitplanes and improved Arnold scrambling. Firstly, we design a quantum video representation based on bitplanes (BRQV) and an improved Arnold scrambling to entangle video frames. Then, we use 2D quantum wavelet transforms and an improved logic mapping for frequency-domain encryption. The encryption security analysis reveals that the post-encryption SSIM value is close to 0.015, with an information entropy reaching 7.9541. The circuit complexity analysis shows that the proposed method can realize the video encryption using \(16{n^3} + 272{n^2} - 88n\) $16n^3+272n^2-88n$ quantum basic gates with the circuit width \(2n + \log _2 n + 5\) $2n+{log}_{2}n+5$ . The best existing quantum video encryption method needs \(\mathrm{{O(}}{2^n}{n^3})\) $\mathrm{O}(2^n{n}^3)$ quantum basic gates with the circuit width \(3n + 3\) $3n+3$ . Simulation results demonstrate that the proposed video encryption method exhibits low correlation coefficients and high efficiency.