Scheme of image optical encryption with spatially incoherent illumination and ability of dynamic change of encyption key

Scheme of image optical encryption with spatially incoherent illumination and ability of dynamic change of encryption key is proposed. In proposed scheme in capacity of dynamically changeable encryption elements kinoforms are used. They are displayed with liquid crystal spatial light modulator. It allows to encrypt images at the registration stage with rate of dozens images per second. Results of images optical encryption and numerical decryption are presented.