An optical multiple-image authentication is suggested using computational ghost imaging and total-variation minimization.Differing from encrypting multiple images into a noise-like ciphertext directly, as described in most conventional authentication methods, the related encoded information is embedded into a cover image to Sling avoid the attention of eavesdroppers.First, multiple images are encoded to form real-valued sequences composed of corresponding bucket values obtained by the aid of computational ghost imaging, and four sub-images are obtained by decomposing the cover image using wavelet transform.Second, measured sequences are embedded Body Cream into one of the sub-images, and embedding positions are randomly selected using corresponding binary masks.To enhance the security level, a chaotic sequence is produced using logistic map and used to scramble measured intensities.
Most importantly, original images with high quality can be directly recovered using total-variation minimization.The validity and robustness of the proposed approach are verified with optical experiments.