"Design a blockchain-based digital identity system that ensures secure, decentralized, and transparent management of personal data. Provide a comprehensive technical overview,** including:** ## 1.** System Architecture:** Describe the components, interactions, and data flow, using diagrams where necessary. ## 2.** Security Measures:** Outline the cryptographic techniques, access controls, and data encryption methods employed to protect user data. ## 3.** Scalability:** Discuss the system's ability to handle a large number of users and transactions, including any proposed solutions for scalability challenges. ## 4.** Implementation Challenges:** Identify potential challenges and propose solutions for issues such as interoperability, regulatory compliance, and user adoption. ## 5.** Data Management:** Explain how the system ensures data integrity, privacy, and user control, including any mechanisms for data recovery and revocation. ## 6.** User Experience:** Describe the user interface and experience, including any tools or features that facilitate user management of their digital identity. Assume an audience of advanced developers familiar with blockchain technology and provide detailed, technical responses with examples to support your design."