Post-quantum key establishment
ML-KEM is a module-lattice-based key-encapsulation mechanism for establishing shared secrets. It is not a transaction-signature algorithm and does not by itself make an MPC wallet quantum-safe.
Independent intelligence on multi-party computation, post-quantum signing and institutional key infrastructure for banks, custodians, wallet providers, payment firms and digital-asset platforms.
Google Cloud has documented Multi-party Compute, a preview service combining threshold signing, transaction policy enforcement and enterprise governance for institutional digital-asset custody. Public reporting indicates a targeted general availability in early 2027.
Cryptographic distinction: Threshold ECDSA or EdDSA signing is not inherently post-quantum secure. A quantum-resistant deployment requires assessment of the underlying signature scheme, key-management protocols and migration path, including relevant standards such as NIST ML-DSA (FIPS 204).
Independent editorial coverage. QuantumSafeMPC.com is not affiliated with, sponsored by or endorsed by Google or Google Cloud.
The alternative to buying a monolithic third-party custody or wallet platform is to integrate the cryptographic infrastructure directly into your own product and operating environment.
Keep your customer experience, APIs, workflows and product logic under your own brand and architecture.
Control deployment, key-share storage, network segmentation, access policies and operational governance inside your trusted environment.
Use an MPC SDK as the cryptographic layer for distributed key generation and signing instead of outsourcing the entire wallet stack.
Quantum-safe MPC is an emerging category spanning MPC and threshold-signing platforms, post-quantum cryptography, HSM and key-management infrastructure, institutional custody technology and migration tooling.
QuantumSafeMPC.com is vendor-neutral. The goal is to help institutions understand architectural options, identify relevant providers and define a practical migration path based on control, deployment, compliance and interoperability requirements.
This is not simply another custody platform. The distinction is where the institution wants the technology and operational control to live.
A provider supplies a broad managed stack. This can reduce implementation work, but the institution adopts more of the provider's platform and operating model.
Integrate MPC, threshold signing, HSM or hybrid cryptographic infrastructure into the operating model that fits your institution.
More engineering responsibility, but greater control over architecture, security boundaries, deployment and differentiation.
A short qualification flow for banks, custodians, wallet providers and payment infrastructure teams. Identify migration priorities and the type of solution that may fit your environment.
Banks, custodians, exchanges, stablecoin issuers and fintechs can integrate MPC signing into products they operate themselves rather than treating wallet security as an all-or-nothing outsourced platform decision.
Build branded wallet products with distributed signing underneath the application layer.
Integrate MPC into a custody architecture while retaining control of policy, operations and deployment.
Embed distributed signing into payment, settlement and treasury workflows with institution-defined controls.
Build proprietary custody infrastructure with MPC signing inside the institution’s own security and governance boundary.
Create differentiated enterprise wallets without outsourcing the complete wallet platform.
Embed institution-controlled signing into stablecoin issuance, treasury and payment workflows.
Modernize key management while preserving institutional control, integration flexibility and auditability.
Define your signing model, deployment preference, migration horizon and control requirements. QuantumSafeMPC.com can then route your enquiry toward relevant categories of technology providers without locking the site to a single vendor.
A practical starting point for post-quantum MPC, threshold signing and cryptographic migration planning.
Quantum-safe MPC combines distributed signing or threshold-control concepts with cryptographic designs and migration strategies intended to remain resilient as post-quantum standards and implementations mature.
No. MPC changes how signing authority is distributed, but the underlying signature algorithms and wider cryptographic dependencies still need to be assessed for post-quantum risk.
Banks, custodians, exchanges, wallet providers, payment companies and enterprises that depend on long-lived signing infrastructure should map dependencies early because cryptographic migrations can take years.
Answer five short questions about your requirements, current signing model, timeline and project size. We use the context to identify relevant quantum-safe MPC, post-quantum, HSM, custody or wallet infrastructure options.
MPC, PQC, custody, HSM and wallet infrastructure providers can apply for qualified lead delivery, provider visibility, category sponsorship or a defined exclusive funnel partnership.
Cryptographic engineering / standards reference
For institutional custody and high-value signing, distinguish key establishment, signature algorithms, distributed signing protocols, and the verifying application. These layers have different threat models and migration constraints.
ML-KEM is a module-lattice-based key-encapsulation mechanism for establishing shared secrets. It is not a transaction-signature algorithm and does not by itself make an MPC wallet quantum-safe.
ML-DSA is a standardized module-lattice-based signature scheme. Deployment requires compatible key formats, verification logic and, where relevant, chain or smart-contract support.
SLH-DSA provides a stateless hash-based signature option, with different signature-size and performance trade-offs. Algorithm selection must follow an application-specific assessment.
| Layer | Mechanism / concept | Critical validation question |
|---|---|---|
| Secure channels | ML-KEM / hybrid key establishment | Is session-key establishment protected against future quantum attacks, and how is the hybrid construction specified? |
| Transaction authorization | ML-DSA or another supported post-quantum signature | Can the target chain, verifier or application validate the actual signature scheme? |
| Distributed key control | Threshold cryptography, MPC, verifiable secret sharing | What are the adversary model, corruption threshold, setup assumptions and security proof? |
| Threshold post-quantum signing | Research and implementation-specific lattice-based threshold protocols | Is there a concrete, independently reviewed implementation and a verifiable post-quantum security claim? |
| Operational assurance | HSM boundaries, attestation, auditing, rotation and recovery | Who controls shares, how are devices verified, and what happens during compromise or migration? |
01 Inventory signature schemes, key-exchange paths and verification dependencies
02 Map Shor-vulnerable RSA/ECC exposure and long-lived confidentiality needs
03 Define threshold t-of-n, collusion tolerance and trust boundaries
04 Evaluate ML-KEM for communications; ML-DSA / SLH-DSA for signatures
05 Verify protocol proofs, implementation audits and side-channel mitigations
06 Test interoperability, chain support, recovery, rotation and migrationPrimary standards: NIST FIPS 203 · NIST FIPS 204 · NIST FIPS 205. Independent research orientation; no certification or security guarantee is implied.