We explain the vulnerability of the phase-only encryption procedure suggested by Seo and Kim [Opt. Lett. <i>28</i>, 304 (2003)] and clarify issues regarding its robustness and degree of security compared with those of a previously reported phase-only encryption method.
© 2003 Optical Society of America
(070.4560) Fourier optics and signal processing : Data processing by optical means
(100.1160) Image processing : Analog optical image processing
(100.1390) Image processing : Binary phase-only filters
(100.3010) Image processing : Image reconstruction techniques
(120.3180) Instrumentation, measurement, and metrology : Interferometry
Jesper Glückstad, Vincent R. Daria, and Peter J. Rodrigo, "Comment on Interferometric phase-only optical encryption system that uses a reference wave," Opt. Lett. 28, 1075-1076 (2003)