Asymmetric cryptosystem based on phase-truncated Fourier transforms.

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.

[1]  Peng Zhang,et al.  Known-plaintext attack on optical encryption based on double random phase keys. , 2006, Optics letters.

[2]  Hsuan T Chang,et al.  Multiple-phase retrieval for optical security systems by use of random-phase encoding. , 2002, Applied optics.

[3]  Peng Zhang,et al.  Asymmetric cryptography based on wavefront sensing. , 2006, Optics letters.

[4]  B Javidi,et al.  Optical image encryption based on input plane and Fourier plane random encoding. , 1995, Optics letters.

[5]  Guo-Shiang Lin,et al.  Public-key-based optical image cryptosystem based on data embedding techniques , 2003 .

[6]  Jingjuan Zhang,et al.  Double random-phase encoding in the Fresnel domain. , 2004, Optics letters.

[7]  Y Li,et al.  Security and encryption optical systems based on a correlator with significant output images. , 2000, Applied optics.

[8]  B. Javidi.  Securing Information with Optical Technologies , 1997 .

[9]  Xiang Peng,et al.  Vulnerability to known-plaintext attack of optical encryption schemes based on two fractional Fourier transform order keys and double random phase keys , 2009 .

[10]  Arturo Carnicer,et al.  Vulnerability to chosen-cyphertext attacks of optical encryption schemes based on double random phase keys. , 2005, Optics letters.

[11]  Chris Chatwin,et al.  Random phase encoding for optical security , 1996 .

[12]  Peng Zhang,et al.  Chosen-plaintext attack on lensless double-random phase encoding in the Fresnel domain. , 2006, Optics letters.

[13]  Kehar Singh,et al.  Double random fractional Fourier domain encoding for optical security , 2000 .