Sharing Numerous Images Secretly with Reduced Possessing Load

Article type: Research Article

Authors: Chen, Chien-Chang | Chien, Yu-Wei

Affiliations: Department of Computer Science, Hsuan Chuang University, Hsinchu 300, Taiwan. cchen34@hcu.edu.tw

Note: [] Address for correspondence: Department of Computer Science, Hsuan Chuang University, Hsinchu 300, Taiwan

Abstract: This work presents a secret image sharing approach for sharing several secret images while reducing each participants possessing load to only one shared image. The proposed approach employs a random image and a hash function to create corresponding random-like shift images for each secret image, and then publishes the generated images. The random image is then secretly shared to each participant, such that each participant can only possess one shared image to recover the random image, thus enabling the computation of all secret images. The contiguous hash results modify the secret images to random-like public images that are secure for malicious attacks. Experimental results indicate that the proposed method can share several secret images but reduce the possessing load of each participant efficiently. Attacks on shared or public images are also discussed.

Keywords: multistage secret sharing, secret image sharing, hash function

Journal: Fundamenta Informaticae, vol. 86, no. 4, pp. 447-458, 2008