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
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)