Next-Generation SPIFFE/SPIRE Identity Management Systems with Post-Quantum Cryptography Algorithms

Quantum transition reached a new level of importance since NIST standardized post-quantum cryptographic algorithms in late 2024. Consequently, several studies addressed the required changes in existing technologies and systems embracing post-quantum algorithms to face an imminent quantum threat. Cloud-based environments are no different, especially when assuring correct authentication and authorization. We address the usage of post-quantum primitives embedded in identitymanagement systems, a crucial entity inside distributed systems. Our proposal is based on SPIFFE / SPIRE, an open-source framework for secure identity production, integrating postquantum and classical primitives in a hybrid manner. Moreover, we discuss using X.509 certificates as part of our infrastructure and their performance, combining different digital signature algorithms.