Asymmetric cryptosystem based on optical scanning cryptography and elliptic cur
ve algorithm
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     * Open Access
     * [2]Published: 11 May 2022

Asymmetric cryptosystem based on optical scanning cryptography and elliptic
curve algorithm

     * [3]Xiangyu Chang,
     * [4]Wei Li,
     * …
     * [5]Ting-Chung Poon

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   [6]Scientific Reports volume 12, Article number: 7722 (2022) [7]Cite
   this article
     * 359 Accesses
     * [8]Metricsdetails

Abstract

   We propose an asymmetric cryptosystem based on optical scanning
   cryptography (OSC) and elliptic curve cryptography (ECC) algorithm. In
   the encryption stage of OSC, an object is encrypted to cosine and sine
   holograms by two pupil functions calculated via ECC algorithm from
   sender’s biometric image, which is sender’s private key. With the ECC
   algorithm, these holograms are encrypted to ciphertext, which is sent
   to the receiver. In the stage of decryption, the encrypted holograms
   can be decrypted by receiver’s biometric private key which is different
   from the sender’s private key. The approach is an asymmetric
   cryptosystem which solves the problem of the management and dispatch of
   keys in OSC and has more security strength than the conventional OSC.
   The feasibility of the proposed method has been convincingly verified
   by numerical and experiment results.

Introduction

   Optical image encryption has attracted much attention in recent years
   because of its inherent capability of high parallelism and
   multidimensional freedoms (amplitude, phase and polarization). Since
   Refrégiér and Javidi first proposed the double random phase encoding
   (DRPE) technique[9]1, researchers have introduced many extended optical
   encryption methods such as a series of optical
   transforms[10]2,[11]3,[12]4,[13]5, digital holography[14]6,[15]7,[16]8,
   joint transform correlator[17]9,[18]10,[19]11 and ghost
   imaging[20]12,[21]13,[22]14, etc. Furthermore, optical scanning
   cryptography (OSC)[23]15,[24]16,[25]17,[26]18,[27]19 envisioned by Poon
   has become a prospective technology. Different from that of other
   CCD-based hologram acquisition systems, it can capture the hologram of
   a physical object with a fast scanning mechanism along with
   single-pixel recording. Indeed, some encryption systems have been
   proposed based on OSC. Yan et al. obtained experimental results of
   encryption using fingerprint keys[28]18. Furthermore, they first
   demonstrated optical cryptography of 3-D object images in an incoherent
   optical system with biometric keys[29]19

References

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