Access Revocation Messaging via Separate Channel

The patent segments data storage by creating separate encrypted data stores for each customer within the multitenant environment. Each customer's data is isolated in its own encrypted namespace, allowing multiple customers to share the same cloud infrastructure while maintaining individual data security and access control. This resolves the contradiction by enabling data sharing at the infrastructure level while preventing unauthorized access at the data level.

The patent introduces encryption keys and key management mechanisms as intermediaries between customer data and service providers. The encryption keys act as a mediator that controls access to customer data, allowing service providers to access encrypted data stores without having direct access to the actual customer data. This intermediary layer enables data sharing while maintaining security and compliance with GDPR access control requirements.

The patent implements self-service access control where customers have direct control over their own encryption keys and can independently manage access to their data. The system automatically handles key generation, storage, and rotation without requiring complex centralized key management infrastructure. This self-service approach maintains high data security while reducing system complexity by eliminating the need for sophisticated centralized access control mechanisms.

The patent changes the fundamental parameter of access control from managing user permissions to managing encryption keys. Instead of implementing complex permission-based access control systems, the solution transforms the problem into key management, where security is achieved through cryptographic parameters rather than access control lists and permission matrices. This parameter change simplifies the system architecture while maintaining strong security guarantees.