This paper presents an algorithm for protecting and encoding QR codes using truth-table-based encoding, allowing multiple codes with similar functions to be combined into a single QR image. Our approach transforms traditional binary QR codes into color images while preserving the original information, making it difficult for standard QR readers to extract data. A specialized decoder, based on the truth table, is designed to retrieve information from the encoded QR code. The encoding occurs at the pixel level, where specific RGB intensity values are assigned, and during decoding, these values are replaced to reconstruct the original QR code. This system aims to address issues related to manual attendance and the excessive use of similar QR codes by enabling a single secure QR code for multiple access scenarios, such as library resources, class attendance, and parking tickets. Extensive experiments demonstrate the robustness and effectiveness of our proposed method.