# Use Cases of DIA & DPS The coupling of DIA (Decentralized Identity Authentication) and DPS (Device Protection System) provides efficient management solutions to several IoT systems. These days, services using IoT devices are increasing in various IT fields such as smart home, smart city, and smart working. In the case of smart homes, it can various lifestyle customization services adjust to individuals’ lifestyles such as security cameras, managing electronic devices, automatic ordering of necessities, and healthcare. When DIA & DPS solutions are adopted to smart home systems, users can directly manage their smart home devices and data without worrying about personal information leakage or invasion of privacy due to device hacking. And as needed, you can provide data that you’ve made to a third party and get rewarded for it. In the case of smart cities, each organization can effectively track the use of data while collecting and processing the data without leaking information from citizens and organizations, by introducing a DPS system to each device in a smart city, such as a traffic information system, weather information collection, power management, emergency rescue system, and granting data access rights only to specific DIA assigned by the organization. In the case of a company, it is possible to protect the personal information of users who provide IoT services by installing a DPS system on the IoT devices they provide, while effectively reducing risks and costs for their own data security systems. In addition, it is possible to prepare for data loss and hacking by building an in-house DPS system to strengthen the security of devices and data requiring security, and storing data requiring security in decentralized storage using smart contracts. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://ontactprotocol-team.gitbook.io/ontactprotocol_en/use-cases-of-dia-and-dps.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.