# 2.1 Key Components • Blockchain Infrastructure: DApps like BIZA-CarnegieMall ensures data integrity, security, and transparency through a robust blockchain infrastructure. All transactions and ownership records are immutably stored on the blockchain, providing reliability. • Decentralized Identity (DID): Users can fully control their personal data through a decentralized identity system, enhancing identity verification and privacy in the online shopping mall. • Smart Contracts: DApps automate processes and ensure trusted transactions without intermediaries using smart contracts. For instance, BIZA-CarnegieMall’s escrow services hold payments until the buyer receives the goods. --- # 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://amaxg.gitbook.io/whitepaper-eng/core-concepts/2.-core-architecture/2.1-key-components.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.