Fig. 1. Original image information

Fig. 2. Schematic diagram of spatial frequency and sampling array of spiral phase plates

Fig. 3. Sampling constants diagram of under different topological charges

Fig. 4. Schematic diagram of OAM-preserved hologram acquisition process

Fig. 5. Schematic diagram of OAM composite selective hologram acquisition process

Fig. 6. Schematic diagram of the decryption optical path

Fig. 7. Decryption result when \begin{document}$m{\text{ = 1,\;2}}$\end{document} OAM beam is irradiated

Fig. 8. Decryption result when \begin{document}$m{\text{ = 1}}$\end{document} OAM beam is irradiated

Fig. 9. Decryption result when \begin{document}$m{\text{ = 2}}$\end{document} OAM beam is irradiated

Fig. 10. Decryption result when \begin{document}$m \ne {\text{1,\;2}}$\end{document} OAM beam is irradiated

Fig. 11. Shear resistance simulation results

Fig. 12. Noise immunity simulation results