We comment on the recent Letter, by Liu et al. [Opt. Lett. 38, 1651 (2013)] in which a method to improve the security strength of the asymmetric cryptosystem (ACS) by Qin and Peng [Opt. Lett. 35, 118 (2010)] was proposed. However, in accordance with Liu’s methodology, we could easily find other more efficient ways to achieve their purpose. More importantly, we think it is vitally necessary to point out that there exists a widespread, fundamental misunderstanding on the concept of ACS, which has also been studied in a series of related works.
© 2013 Optical Society of America
Fiber Optics and Optical Communications
Original Manuscript: August 6, 2013
Revised Manuscript: August 22, 2013
Manuscript Accepted: August 22, 2013
Published: October 4, 2013
Wenqi He, Xiangfeng Meng, and Xiang Peng, "Asymmetric cryptosystem using random binary phase modulation based on mixture retrieval type of Yang-Gu algorithm: comment," Opt. Lett. 38, 4044-4044 (2013)