一种安全的大容量量子图像水印协议

A Secure Quantum Watermark Protocol with Large Payload

基于量子图像的柔性表示法,提出一种安全的量子水印协议,借助连分式算法以加强水印图像的不可见性。在协议执行过程中,只有产权方才能提取和恢复水印,既保证了水印图像安全,又提供了有效的版权证明。实验结果表明,相比传统水印协议,该协议的水印图像尺寸达到最大,并且嵌入容量提高了8倍,能够更好地度量协议执行的计算负载性能。

Based on the Flexible Representation for Quantum Image（ FRQI）,a secure quantum watermark protocol is proposed. The new protocol is enhanced in invisibility by making full use of continued-fraction algorithm. It is impossible for anyone except the copyrighter to extract and recover the water image during the protocol execution,which ensures the security of the watermark image,while also providing effective copyright certificate. Simulation results show that compared with the traditional watermark protocol,the size of watermark image reaches the maximum value and the capacity of the new protocol is expanded to eight times that of the previous protocols,and it can better measure the performance of the computation load that is executed by the protocol.