Chang Xiangyu, Li Wei, Yan Aimin, Tsang Peter Wai Ming, Poon Ting-Chung
College of Mathematics and Science, Shanghai Normal University, Shanghai, 200234, China.
Department of Electronic Engineering Hong Kong, City University of Hong Kong, Kowloon Tong, Hong Kong SAR, China.
Sci Rep. 2022 May 11;12(1):7722. doi: 10.1038/s41598-022-11861-x.
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.
我们提出了一种基于光学扫描密码术（OSC）和椭圆曲线密码术（ECC）算法的非对称密码系统。在OSC的加密阶段，一个物体通过由发送者生物特征图像经ECC算法计算得到的两个光瞳函数被加密为余弦和正弦全息图，该生物特征图像即发送者的私钥。利用ECC算法，这些全息图被加密为密文并发送给接收者。在解密阶段，加密的全息图可由与发送者私钥不同的接收者生物特征私钥进行解密。该方法是一种非对称密码系统，解决了OSC中密钥的管理和分发问题，并且比传统OSC具有更高的安全强度。所提方法的可行性已通过数值和实验结果得到令人信服的验证。
