College of Optoelectronic Engineering, Key Laboratory of Optoelectronics Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen, China.
Opt Lett. 2010 Jan 15;35(2):118-20. doi: 10.1364/OL.35.000118.
We propose an asymmetric cryptosystem based on a phase-truncated Fourier transform. With phase truncation in Fourier transform, one is able to produce an asymmetric ciphertext as real-valued and stationary white noise by using two random phase keys as public keys, while a legal user can retrieve the plaintext using another two different private phase keys in the decryption process. Owing to the nonlinear operation of phase truncation, high robustness against existing attacks could be achieved. A set of simulation results shows the validity of proposed asymmetric cryptosystem.
我们提出了一种基于相位截断傅里叶变换的非对称密码系统。通过在傅里叶变换中进行相位截断，使用两个随机相位密钥作为公钥，可以生成实值和稳定的白噪声形式的非对称密文，而合法用户可以在解密过程中使用另外两个不同的私钥相位来恢复明文。由于相位截断的非线性操作，可以实现对现有攻击的高鲁棒性。一组仿真结果表明了所提出的非对称密码系统的有效性。
