Quantum Cryptography -- New OVDs for Personalized Documents Based on Color Holography and Lippmann Photography -- Distortion- and Noise-Robust Digital Watermarking Using Input and Fourier-Plane Phase Encoding -- Steganography and Encryption Systems Based on Spatial Correlators with Meaningful Output Images -- Optoelectronic Information Encryption with Incoherent Light -- Information Hiding: Steā¦