J
John Fredy Barrera
Researcher at Facultad de Ciencias Exactas y Naturales
Publications - 68
Citations - 1867
John Fredy Barrera is an academic researcher from Facultad de Ciencias Exactas y Naturales. The author has contributed to research in topics: Encryption & Multiplexing. The author has an hindex of 22, co-authored 67 publications receiving 1696 citations. Previous affiliations of John Fredy Barrera include University of Antioquia.
Papers
More filters
Journal ArticleDOI
Roadmap on optical security
Bahram Javidi,Artur Carnicer,Masahiro Yamaguchi,Takanori Nomura,Elisabet Pérez-Cabré,María S. Millán,Naveen K. Nishchal,Roberto Torroba,John Fredy Barrera,Wenqi He,Xiang Peng,Adrian Stern,Yair Rivenson,Ayman Alfalou,Christian Brosseau,Changliang Guo,John T. Sheridan,Guohai Situ,Makoto Naruse,Tsutomu Matsumoto,Ignasi Juvells,Enrique Tajahuerce,Jesús Lancis,Wen Chen,Xudong Chen,Pepijn W. H. Pinkse,Allard Mosk,Adam Markman +27 more
TL;DR: An overview of the potential, recent advances, and challenges of optical security and encryption using free space optics is presented, highlighting the need for more specialized hardware and image processing algorithms.
Journal ArticleDOI
Optical encryption and QR codes: Secure and noise-free information retrieval
TL;DR: This work introduces for the first time the concept of an information "container" before a standard optical encrypting procedure which is a QR code which offers the main advantage of being tolerant to pollutant speckle noise.
Journal ArticleDOI
Multiplexing encrypted data by using polarized light
TL;DR: The feasibility of multiplexing, employing polarized light, a set of security encrypted data, based on the double random pure-phase enciphering method is investigated, and experimental results that confirm the approach are shown.
Journal ArticleDOI
Multiplexing encryption–decryption via lateral shifting of a random phase mask
TL;DR: An holographic memory optical arrangement based on the successive shifting of a random pure-phase mask to achieve encrypted images multiplexing and the read-out fidelity of the proposed arrangement is included.
Journal ArticleDOI
Experimental QR code optical encryption: noise-free data recovering
TL;DR: The experimental implementation of a quick response (QR) code as a "container" in an optical encryption system and a new protocol in which the reception of the encrypted QR code and its decryption, the digital block processing, and the reading of the decrypted QR code are performed employing only one device.