16 Conclusion

AMATELUS provides a clean separation of concerns:

• Cryptographic layer: AMATELUS ensures authentication and privacy

• Service layer: Service providers ensure authorization and delivery

• User layer: Users choose which services and DIDs to use

This architecture achieves:

• Security: Formal cryptographic guarantees

• Scalability: Linear throughput with users

• Privacy: Cross-service unlinkability

• Simplicity: Clear responsibility boundaries

• Practicality: No distributed infrastructure burden on users

The protocol enables centralized services to provide decentralized authentication—a pragmatic foundation for digital governance in the real world.