For material circulation, End-of-life (EOL) products need to be collected and suitable lifecycle options, such as remanufacturing, and recycling determined, based on their conditions. Disassembly production planning involves decisions of lifecycle options for each component retrieved from the EOL products, and the number of EOL products or components for each recovery process, such as disassembly, inspection, remanufacturing, and recycling. Remanufacturing requires complete disassembly for inspection, and reassembling to keep product functionality. Meanwhile, although the spread of Internet-of-things (IoT) products has made our lives more convenient, information security risks have also increased because various types of IoT products can connect to the internet and store our personal data. Generally, for IoT products at an EOL stage, security updates should be conducted, and their ownership transferred. Additionally, material recycling can be a solution to address components with vulnerability. Therefore, remanufacturing IoT products requires dealing with information security risks by removing components with vulnerabilities for material recycling, and updating key/certification. This study aims to design disassembly production to combat information security risks in remanufactured IoT products using a mathematical model. The proposed model determines the number of EOL products or components for each recovery process, such as disassembly, inspection, recycling, and key/certification updation.