BRISBANE, Australia, April 07, 2026 -- Cryptsoft has successfully demonstrated a Hybrid Post-Quantum Cryptography (PQC) authentication token proof-of-concept (POC) combining a low-memory rust implementation of ML-DSA-65 with Fetian's OpenSK dongle to deliver hybrid PQC passkey authentication for the Cryptsoft KMIP C Server. This POC demonstrates a practical path to implementing the quantum-safe authentication systems, systems that up to now have been a critical missing element allowing for the build-out of PQC security systems and infrastructure.

The solution builds on top of one of the development branches of the OpenSK project, but replaces the cryptographic implementation with the ML-DSA-65 implementation from Bouncy Castle's bc-rust alpha release which was then tuned for embedded platform use. To enable PQC algorithm support in highly embedded platforms like OpenSK-class devices, a memory-efficient design throughout key generation, signing, and verification was required.

Public-key material is derived incrementally, and fully expanded private-key state is reconstructed only when needed for signing. During signing, the implementation avoids materializing large vectors and processes signing state sequentially, row by row or component by component, recomputes commitment and response data as needed, hashes incrementally, and packs results directly into the output buffer. Verification follows the same model by reconstructing only the required data and streaming hash inputs rather than building large intermediate structures. These techniques were applied in earlier attempts by the OpenSK project on a lower security strength and non-standardised version of Dilithium and we have adapted these approaches to the bc-rust alpha ML-DSA-65 implementation.

"The successful integration of ML-DSA-44, ML-DSA-65 and ML-DSA-87 into OpenSK demonstrates Cryptsoft's commitment to advancing security standards and to driving innovation in the Key Management Server market," said Justin Corlett, Business Development Manager, Cryptsoft. "It gives developers, security engineers, and researchers a practical platform for testing how next-generation FIDO2 credentials may operate in a modern PQC-ready security architecture."

"FEITIAN is thrilled to congratulate Cryptsoft on implementing NIST PQC Algorithms into their products and SDKs. By leveraging the FEITIAN hardware platform, Cryptsoft has demonstrated how collaboration can solve the most pressing security challenges of the quantum era. At FEITIAN, we will continue our dedicated efforts to ensure our hardware remains a trusted, future-proof foundation for the global security ecosystem." - Geoffrey Li, International Technical Director at FEITIAN Technologies Co. Ltd.

"A goal of the bc-rust project is to ensure support for embedded platforms and constrained environments. Meeting this goal is one of the reasons we have worked with Cryptsoft to better explore and understand techniques for PQC algorithms on constrained devices." - David Hook, Secretary, Legion of the Bouncy Castle Inc.

Note the resulting FEITIAN hardware token, combined with the Cryptsoft modified OpenSK firmware is not FIDO2 certified and is intended for development testing only.