We propose a two-step integral imaging coding based three-dimensional (3D) information encryption approach in this paper. In\nthis approach, a synthetic aperture integral imaging system is applied to acquire a set of parallax images including spatial and\nangular information of 3D scene. In the encryption process, two-step coding is performed. In the first step, the acquired parallax\nimages are encrypted firstly by double random-phase coding in the Fresnel domain. In the second step, these encrypted parallax\nimages are encoded into a cipher image bymapping algorithmwhich is used to generate elemental image array of integral imaging.\nIn the decryption process, an inverse operation is performed. The experimental results demonstrate the feasibility, security, and\nrobustness of the proposed approach.
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