Decomposition storage of information based on computer-generated hologram interference and its application in optical image encryption
Yongkang Guo, Qizhong Huang, Jinglei Du, Yixiao Zhang · Applied Optics · 2001
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.