title: Optical image encryption via ptychography.
abstract: Ptychography is combined with optical image encryption for the first time. Due to the nature of ptychography, not only is the interferometric optical setup that is usually adopted not required any more, but also the encryption for a complex-valued image is achievable. Considering that the probes overlapping with each other is the crucial factor in ptychography, their complex-amplitude functions can serve as a kind of secret keys that lead to the enlarged key space and the enhanced system security. Further, since only introducing the probes into the input of common system is required, it is convenient to combine ptychography with many existing optical image encryption systems for varied security applications.
authors: College of Material Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China. optsys@gmail.com
authors: Yishi
authors: Y
authors: Shi
authors: Tuo
authors: T
authors: Li
authors: Yali
authors: Y
authors: Wang
authors: Qiankun
authors: Q
authors: Gao
authors: Sanguo
authors: S
authors: Zhang
authors: Haifei
authors: H
authors: Li