B. Javidi et al., EXPERIMENTAL DEMONSTRATION OF THE RANDOM-PHASE ENCODING TECHNIQUE FORIMAGE ENCRYPTION AND SECURITY VERIFICATION, Optical engineering, 35(9), 1996, pp. 2506-2512
Optical image encryption and security using random phase encoding tech
niques have been proposed recently. We present optical experimental re
sults for image encryption and security. The results show that for the
image encryption, the image can be well encrypted using random phase
masks with a limited number of pixels. We also tested the performance
of the optical system for security verification in the presence of dif
ferent types of input noise and distortions such as scratches, fingerp
rint marks, and bending of the phase mask. The experimental results in
dicate that for the severity of the noise and the degree of distortion
tested here, the system provides good performance in verifying the ph
ase code. (C) 1996 Society of Photo-Optical Instrumentation Engineers.