Image sequence encryption based on chaotic fingerprint phase mask and single-shot digital holography

In this paper, an image sequence encryption scheme based on chaotic fingerprint phase mask and single-shot digital holography is proposed. In this proposed encryption scheme, the fingerprint serves as the secret key directly, and the chaotic fingerprint phase masks generated from the fingerprint using the secure hash algorithm and chaotic map are just used as interim variables. With the help of the chaotic fingerprint phase masks located in the Fresnel transform domain and the single-shot digital holography, an introductory image sequence can be encrypted into a series of noise-like holograms. Since the fingerprint key shared by the sender and authorized receiver is strongly linked with the user and need not be transmitted via the open network, the security of the proposed encryption scheme will be enhanced greatly. In addition, the parameters of the chaotic map and Fresnel transform can also provide additional security to the proposed encryption scheme. Numerical simulations and analysis have been carried out to verify the feasibility, security, and robustness of the proposed encryption scheme.