An information-encryption method based on computer-generated hologram (CGH) interference is presented. In this method the original information is decomposed into two parts, and then each part is encoded on a separate CGH. When these two encoded CGHs are aligned and illuminated, a combined interference pattern is formed. The original information is obtained from this pattern. It is impossible to decrypt the original information from one CGH alone; two matched CGHs must be put together to make it available.
© 2001 Optical Society of America
Original Manuscript: March 21, 2000
Revised Manuscript: December 19, 2000
Published: June 10, 2001
Yongkang Guo, Qizhong Huang, Jinglei Du, and Yixiao Zhang, "Decomposition storage of information based on computer-generated hologram interference and its application in optical image encryption," Appl. Opt. 40, 2860-2863 (2001)