info:eu-repo/semantics/article
Fractional optical cryptographic protocol for data containers in a noise-free multiuser environment
Fecha
2018-03Registro en:
Jaramillo, Alexis; Barrera Ramírez, John Fredy; Velez Zea, Alejandro; Torroba, Roberto Daniel; Fractional optical cryptographic protocol for data containers in a noise-free multiuser environment; Elsevier; Optics And Lasers In Engineering; 102; 3-2018; 119-125
0143-8166
CONICET Digital
CONICET
Autor
Jaramillo, Alexis
Barrera Ramírez, John Fredy
Velez Zea, Alejandro
Torroba, Roberto Daniel
Resumen
Optical encryption systems have great potential for flexible and high-performance data protection, making them an area of rapid development. However, most approaches present two main issues, namely, the presence of speckle noise, and the degree of security they offer. Here we introduce an experimental implementation of an optical encrypting protocol that tackles these issues by taking advantage of recent developments in the field. These developments include the introduction of information containers for noise free information retrieval, the use of multiplexing to allow for a multiple user environment and an architecture based on the Joint fractional Fourier transform that allows increased degrees of freedom and simplifies the experimental requirements. Thus, data handling via QR code containers involving multiple users processed in a fractional joint transform correlator produce coded information with increased security and ease of use. In this way, we can guarantee that only the user with the correct combination of encryption key and security parameters can achieve noise free information after deciphering. We analyze the performance of the system when the order of the fractional Fourier transform is changed during decryption. We show experimental results that confirm the validity of our proposal.