How to solve the permission and security issues of cross-domain data access when accessing the knowledge graph?

When a knowledge graph accesses cross-domain data, addressing permission and security issues typically involves constructing a protection system from three aspects: identity authentication, access control, and data encryption. Identity authentication mechanism: Adopt standardized protocols such as OAuth 2.0 or API keys to ensure the identity of data requesters is traceable and prevent anonymous or unauthorized access. Access control strategy: Set permission granularity based on roles (RBAC) or attributes (ABAC). For example, restrict specific users to only access non-sensitive metadata, while core business data requires multi-level approval. Data encryption technology: Use TLS/SSL protocol for data in transit and field-level encryption for data at rest to prevent data leakage during cross-domain transmission or storage. In practice, data desensitization technology and audit logs can be combined to regularly review cross-domain access records, continuously optimize security policies, and reduce the risk of permission abuse.