Double-threshold image secret sharing scheme based on gray mixing model

作者：Li Peng^*; Kong Qian; Ma Yanpeng

来源：ICIC Express Letters, 2014, 8(8): 2135-2140.

• Double threshold
• Gray mixing models
• Image secret sharing
• Secret images
• Visual cryptography
• Visual cryptography schemes
• Visual qualities

A (t, k, n) double-threshold image secret sharing (ISS) scheme is proposed based on gray mixing model. It combines the visual cryptography scheme (VCS) and polynomial-based ISS (PISS) scheme. Each shadow generated by PISS scheme is embedded into the corresponding shadow generated by VCS as a new shadow. In the revealing process, a vague secret image can be visually decoded by stacking t shadows. It also can perfectly reveal the original secret image by computation with any k shadows. The proposed scheme can get small shadow size and good visual quality of the revealed image. Smaller shadow size is more convenient for storage and transmission.

• 出版日期2014
• 单位华北电力大学