# Understanding Topics **Topics are backbone of any messaging pub/sub infrastructure that enables routing of messages from publishers to subscribers and any pub/sub messaging infrastructure main goal is to make them happen efficiently with thre required traits of the infrastructure.** Our core focus is to provide a decentralised Pub/Sub infrastructure to the world that is as fast and reliable as any other messaging infrastructure that exists today like AWS's SQS / SNS / Kinesis etc., Google's Firebase Cloud Messaging / GCM, Azure Service Bus along with added advantages of decentralised infrastructure like privacy, security and censorship resistance. **Topics in DPSN are essentially named channels or feeds of messages.** Similar to other pub/sub systems, they serve as a way to categorize and distribute data to interested subscribers. #### Key Characteristics of Topics in DPSN * **Decentralized Ownership:** Unlike traditional pub/sub systems, topics in DPSN have owners who control access and publishing rights. * **Transferable:** Topic ownership can be transferred between users, enabling a dynamic marketplace for topics. * **Hierarchical Structure:** Topics can be organized in a hierarchical structure, allowing for granular categorization. * **FHE Compatibility:** DPSN supports fully homomorphic encryption, enabling privacy-preserving data sharing through topics. #### Example: A Financial Data Platform ( following topics and subtopics are just example and not real topics of data streams) A financial data platform might use DPSN topics in the following way: * **Primary Topic:** "ogtest-73803f8d5e" * **Sub-topics:** * ogtest-73803f8d5e/cryptocurrency * ogtest-73803f8d5e/stocks * ogtest-73803f8d5e/forex Within these sub-topics, more specific topics can be created: * ogtest-73803f8d5e/cryptocurrency/bitcoin/price**:** Real-time Bitcoin price data * ogtest-73803f8d5e/cryptocurrency/bitcoin/volume**:** Real-time Bitcoin volume data * ogtest-73803f8d5e/cryptocurrency/ethereum/price**:** Real-time Ethereum price data * ogtest-73803f8d5e/stocks/nasdaq/AAPL/price**:** Apple stock price data from Nasdaq **Subscribers** can then subscribe to these topics to receive the specific data they are interested in. For instance, a trader system might subscribe to the "ogtest-73803f8d5e/cryptocurrency/bitcoin/price" topic to get real-time Bitcoin price updates. A trader system who is interested in volumes of all currencies can subscribe to wildcard topic "ogtest-73803f8d5e/cryptocurrency/bitcoin/volume"*. Similarly, a trader system interested in all stocks data can subscribe to* ogtest-73803f8d5e/stocks*.* Topics in DPSN are a fundamental building block for organizing and distributing data. Their decentralized nature, combined with the support for FHE, makes DPSN a powerful platform for secure and efficient data sharing. --- # 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://docs.dpsn.org/understanding-topics.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.