Showing papers by "Tzung-Her Chen published in 2012"

TL;DR: A novel RG-based VSS scheme that encodes multiple secret images at a time that has no pixel expansion, a higher capacity for secret sharing, and no need for a complex VC codebook to be redesigned is proposed.

TL;DR: A new RG-based VSS scheme, which encrypts up to four secret images into two random grids without any pixel expansion and decrypts one secret image by directly stacking tworandom grids and the other three in an additional way of rotating one RG at 90, 180, or 270 degrees, respectively.

TL;DR: To prove the feasibility of cheating, the experimental results and formal analysis illustrate that the proposed collusion attacks do work and that the security risk does exist in RG-based VSS.

TL;DR: The proposed JFD scheme is equipped with two encryption techniques, which are performed on the server side, and the experimental results show that the encrypted image is unintelligible and that the recovered image has desirable image quality resistant to noise interference.