Securing information using optically generated biometric keys

Abstract

In this paper, we present a new technique to obtain biometric keys by using the fingerprint of a person for an optical image encryption system. The key generation scheme uses the fingerprint biometric information in terms of the amplitude mask (AM) and the phase mask (PM) of the reconstructed fingerprint image that is implemented using the digital holographic technique. Statistical tests have been conducted to check the randomness of the fingerprint PM key that enables its usage as an image encryption key. To explore the utility of the generated biometric keys, an optical image encryption system has been further demonstrated based on the phase retrieval algorithm and the double random phase encoding scheme in which keys for the encryption are used as the AM and the PM key. The advantage associated with the proposed scheme is that the biometric keys' retrieval requires the simultaneous presence of the fingerprint hologram and the correct knowledge of the reconstruction parameters at the decryption stage, which not only verifies the authenticity of the person but also protects the valuable fingerprint biometric features of the keys. Numerical results are carried out to prove the feasibility and the effectiveness of the proposed encryption system.

Securing Multiple Information Using Bio-Chaotic Keys

“…The iteration process is stopped when convergence between the recovered image and the original image is completed [35]- [37], [41]. The above steps are used to encode each image into its phase-only function, respectively.…”

Optical multimodal biometric encryption that uses digital holography

“…Optical security techniques have also been used for securing biometric data, or to generate keys based on it for the protection of key personal data [22][23][24][25][26][27][28]. Biometrics comprise the unique biological traits required to establish the identity of a human being.…”

“…Biometrics comprise the unique biological traits required to establish the identity of a human being. If this information is compromised in any way, it is almost impossible to assign new security measures such as a password or keys, given that the subject possesses only a fixed number of biometric traits [22][23][24][25][26][27][28]. The development of secure and effective systems based on biometric identifiers are therefore in high demand, and an area of increasing interest among researchers.…”

“…Digital holography (DH) has played a significant role in the experimental implementation of optical encryption, as well as forming the basis for the development of alternative security schemes [10][11][12][13]. Due to the phase retrieval character of DH, it has proved well-suited to the development of biometric key-based security systems [22][23][24][25][26][27]. A cancellable fingerprint scheme has also been developed for authentication purposes during the course of experiments using optoelectronics based on DH [22].…”

“…Encrypted sensing has also been proposed, using DH for fingerprint images [23]. A security enhanced system with optically generated biometric keys has also been developed using DH [24,25]. In this method, keys generated frombiometric data are employed in both encryption and decryption procedures on the DRPE platform.…”