# 4. Chat Tool Based on DID Decentralized Identity (DID) is an invention combined with blockchain technology, and it is the identity certification in the future decentralized society. It is an address on the blockchain, which is owned and controlled by one person, and can be used to connect DID related files, such as wallet address, crypto account, DAPP interaction, social interaction, login, etc. The target of D3D is to establish a social tool for Web3 users through DID, to acquire true and the most valuable information with the lowest cost and the fastest speed. D3D will manage the group chat by analyzing users’ tags through DID technology. At the same time, D3D will also support the establishment of multi-person chat rooms. --- # 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://d3dsocial.gitbook.io/d3d-white-paper/functions-and-solutions-of-d3d/4.-chat-tool-based-on-did.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.