中文摘要：

针对现有物流系统中的用户隐私信息容易泄露的问题，提出了一种基于二维码和信息隐藏的物流系统隐私保护方案。该方案使用信息隐藏技术将用户隐私信息嵌入快递面单上的二维码中，完成对隐私信息的访问权限控制。为了提升用户隐私信息的安全性，在该方案中设计了一种用于二维码的JPEG图像隐写算法。实验结果表明，该算法使在二维码图像中嵌入的用户隐私信息具有较高的抗检测性能，同时不影响载密二维码的正确扫描和解码。使用本文所提方案，在物流系统中具有访问权限的机构或个人才能够获取这些重要的隐私信息，既确保了快件的正确投递，也保障了用户的隐私安全。

英文摘要：

With regard to the user privacy leakage problem in existing logistics systems, a privacy-preserving scheme for logistics systems based on 2D code and information hiding was proposed. The information hiding technique was used in the proposed scheme to embed the user privacy information into the 2D code on the logistics waybill to achieve access control. To secure the user privacy information, a JPEG image stenographic algorithm for 2D code was designed. Experimental results demonstrate that this algorithm can guarantee the high undetectable performance and the stego 2D code can be correctly decoded. Using the proposed scheme, the institution or the person that has the access right can obtain the important privacy information so that the express can be delivered cor- rectly and the user privacy can be preserved.