Post-Quantum Cryptography for Enterprises

Enterprises face a convergence of pressures that make post-quantum migration an immediate priority, not a future initiative. Regulatory deadlines are hardening. Cyber insurance underwriters are including quantum-readiness in risk assessments. Customers and partners are asking about post-quantum capability in due diligence questionnaires. And the underlying threat — harvest-now, decrypt-later — means that every day of delay extends the window during which sensitive data is being collected for future decryption.

The challenge for enterprises is that traditional cryptographic migration is incompatible with enterprise reality. You cannot take authentication systems offline for migration. You cannot replace HSMs across 50 data centers in a quarter. You cannot re-certify every compliance framework simultaneously. You cannot coordinate migration across hundreds of internal applications and dozens of third-party integrations without a multi-year program office.

This is why enterprises need an API-first approach. H33 adds post-quantum cryptography to your existing infrastructure through REST API calls. Your applications, HSMs, certificate authorities, and key management systems continue operating exactly as they do today. H33 wraps them with post-quantum signatures, key exchange, and attestation. The classical layer provides backward compatibility. The PQ layer provides forward security.

Enterprise Pressures Driving PQ Migration

• Regulatory deadlines: CNSA 2.0 mandates ML-KEM by 2030, ML-DSA by 2033, full classical deprecation by 2035
• Cyber insurance: Underwriters are reducing coverage or increasing premiums for organizations without quantum migration plans
• Customer due diligence: Enterprise procurement questionnaires now include quantum readiness assessments
• Board-level risk: HNDL attacks create present-day fiduciary obligations for data with long-term confidentiality
• Audit findings: SOC 2 and ISO 27001 auditors are flagging cryptographic algorithm dependencies
• Supply chain requirements: Federal contractors face flow-down requirements for quantum-safe communications

Post-quantum cryptography is computationally more expensive than classical cryptography. ML-DSA signatures are larger (2.4 KB vs 64 bytes for Ed25519). ML-KEM key encapsulation involves polynomial arithmetic over structured lattices. Without careful engineering, post-quantum operations can add unacceptable latency to authentication and transaction flows.

H33 solves this through a purpose-built Rust cryptographic engine optimized for ARM64 server processors. The engine processes 2.2 million authentications per second on Graviton4 hardware, with a per-authentication latency of 42 microseconds. This includes full BFV homomorphic encryption, batch ML-DSA signing and verification, and cached ZKP lookups. The performance is sufficient for the largest global banks, payment processors, and identity providers.

H33-74 further compresses the post-quantum attestation footprint to exactly 74 bytes per attestation, regardless of how many algorithms or verification layers are involved. This means adding post-quantum attestation to your existing API responses adds negligible bandwidth overhead.

Post-quantum migration through H33 strengthens your compliance posture across every major framework. Because H33 operates as an additive API layer rather than a replacement, your existing certifications remain intact. The post-quantum layer adds a new security control that auditors increasingly expect to see.