Multi-type images encryption scheme based on hamiltonian conservative hyperchaotic system and FPGA implementationXinjian Ding, Kaiwen Cui, Xin Huang, Jian Zeng and Qun DingEur. Phys. J. Plus, 141 2 (2026) 151DOI: https://doi.org/10.1140/epjp/s13360-026-07334-z