Value of DID

• Decentralization: Based on blockchain, it avoids identity data being controlled by a single centralized authority.

• Identity autonomy and control: Based on distributed public key infrastructure, each user's identity is not controlled by a trusted third party but by its owner. Individuals can autonomously manage their own identities.

• Trusted data exchange: Identity-related data is anchored on the blockchain, and the authentication process does not depend on the application provider that requests the identity. A user's DID digital identity consists of three parts: DID identifier, DID document, and verifiable credentials. Each DID must have a unique DID document but can have an indefinite number of verifiable credentials.

• DID Identifier: Digital identities are identified by DIDs, so the DID identifier should have the characteristics of uniqueness within the application and cross-application self-discovery. The DID identifier follows the W3C specification and mainly consists of three parts: a fixed prefix "did:hpc," a partition identifier "chain_id," and a unique number identifier "account_address."

• DID Document: The DID document is used to describe the characteristics of a digital identity and corresponds to the DID identifier on a one-to-one basis. The DID document records account public keys, account status, authorization management accounts, and provides extensible fields for users to configure flexibly according to their business scenarios. The verification behavior of transactions related to digital identity services will be based on the public keys in the DID document.

• Verifiable Credentials: Verifiable credentials are used to describe the identity attributes of a digital identity holder in the real world. They include information such as the issuer, validity period, and the verified attributes. Verifiable credentials are issued by authoritative institutions, and a digital identity can have an indefinite number of verifiable credentials. With the booming development of the metaverse, each individual's virtual reality will have a unique identity. DID accounts are naturally suitable for this

With the booming development of the metaverse, each individual's virtual reality will have a unique identity. DID accounts are naturally suitable for this scenario. Users will have a unique DID account identity in the metaverse, which can include various real and valid credentials from their real-life, as well as various authorization credentials from the virtual world. Users can choose to display or use them according to their needs, experiencing better services brought by the metaverse.

Additionally, different metaverse scenarios can have different DID account identities, and in the future, account traversal between different metaverses and "cross-universe" asset transactions can be realized. A decentralized DID account system can be flexibly applied in various areas such as consumer data authorization, industry regulation, and government affairs processing. It can also avoid the embarrassing situation of traditional blockchain accounts losing private keys and assets being lost to zero. Furthermore, it can establish one-click login services for on-chain applications and a metaverse identity system.