A low-cost and simple technique for encryption of two-dimensional patterns and shapes is suggested and demonstrated. The method is based on the superposition of random grids.
© 1987 Optical Society of America
Original Manuscript: July 10, 1986
Manuscript Accepted: February 10, 1987
Published: June 1, 1987
O. Kafri and E. Keren, "Encryption of pictures and shapes by random grids," Opt. Lett. 12, 377-379 (1987)