Plaintext-related multiple-image encryption based on computational ghost imaging

The traditional ghost imaging encryption system has high pressure in key transmission and management for involving a series of random phase-only masks (POMs) as keys. And conventional ghost imaging encoding is vulnerable to a chosen-plaintext attack owing to the linearity of the system. To address these problems, a plaintext-related ghost imaging encryption system which can reduce the key size and ensure the security of the system was proposed in this study. It uses parameter keys and plaintext information to generate all random POMs for encryption of plaintext. POMs used to encrypt images depend on both parameter keys and plain image, thus protecting information from cracking by the chosen-plaintext. At the same time, a multiple-image encryption method based on plaintext-related ghost imaging encryption was developed to improve the encryption efficiency of the system. The proposed method is the characteristic of strong multiple-image encryption ability, high security and enough simple structure.