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 tech-nique 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 info... https://www.alarecre.com/Wizarding-World-Harry-Potter-Scar-and-Glasses-iPhone-13-Pro-MagSafe-Case-p90262/