Sender optimal, breach-resilient, and post-quantum secure cryptographic methods …

This invention describes a system for securely checking if an auditor is allowed to access sensitive data stored in a computer system. It uses a special digital structure to verify access rights and relies on a type of cryptography that is efficient and designed to resist attacks from future quantum computers. The claims specifically describe a method where at least one verifier receives a request from an auditor and uses an authenticated access control data structure to cryptographically verify access rights by executing a symmetric cryptographic primitive.