基于视觉密码和QR码的两级信息管理方案

Two-level information management scheme based on visual cryptography and QR code

设计了一种新的扩展多秘密视觉密码,能够分享n个公开信息和n-1个隐私信息,其像素扩展度为4且相对差为1/4。在此基础上,结合QR码提出了一种两级信息管理方案,其中一般参与者的共享份可以呈现参与者公开信息的QR码,而且管理者的共享份与一般共享份叠加后,可以呈现参与者隐私信息的QR码。实验结果表明,公开信息和隐私信息的QR码尽管存在失真,仍可以被正确识别。

This paper designed a new extended multi-secret visual cryptography scheme （EMVCS）, which could share n pub- lic information and n -1 private information. The pixel expansion of EMVCS was 4, and the relative difference was 1/4. Fur- thermore, it proposed a new two-level information management scheme based on EMVCS and QR code, in which the common participants＇ shares could display public information QR code. Meanwhile,the private information QR code of common partici- pants would be shown by stacking the share of manager and common participant. The experimental results demonstrate that the distorted QR codes of public and private information can be recognized correctly.