Setting a Disordered Password on a Photonic Memory
Shih-Wei Su1, Shih-Chuan Gou1, Lock Yue Chew2, Yu-Yen Chang3,4, Ite A. Yu5, Alexey Kalachev6, Wen-Te Liao7*
1Physics, National Changhua University of Education, Changhua, Taiwan
2Physics, Nanyang Technological University, Singapore, Singapore
3Astrophysique, CEA Saclay, Gif-sur-Yvette, France
4Academia Sinica Institute of Astronomy and Astrophysics, Taipei, Taiwan
5Physics, National Tsing Hua University, Hsinchu, Taiwan
6Zavoisky Physical-Technical Institute of the Russian Academy of Sciences, Kazan, Russian Federation
7Physics, National Central University, Taoyuan, Taiwan
* presenting author:WEN-TE LIAO,
Encryption is a vital tool of information technology protecting our data in the world with ubiquitous com- puters. While photons are regarded as ideal information carriers, it is a must to implement such data protection on all-optical storage. However, the intrinsic risk of data breaches in existing schemes of photonic memory was never addressed. We theoretically demonstrate the first protocol using spatially disordered laser fields to encrypt data stored on an optical memory, namely, encrypted photonic memory. Compare with a digital key, a continuous disorder encrypts stored light pulses with a rather long key length against brute-force attacks. To address the broadband storage, we also investigate a novel scheme of disordered echo memory with a high fi- delity approaching unity. Our results pave novel ways to encrypt different schemes of photonic memory based on quantum optics and raise the security level of photonic information technology.

S.-W. Su et al., arXiv:1611.00136 (2016).

Keywords: Photonic memory, Encryption, Electromagnetically induced transparency, Photon echo, Quantum information