Key Management
PQC Key Management
Hybrid classical + post-quantum key encapsulation using ML-KEM / CRYSTALS-Kyber. Secure key storage, rotation, and revocation infrastructure for Web3 and enterprise environments.
Technology
Post-Quantum Cryptography
Quantum computers will break classical public-key cryptography — RSA, ECDSA, and Diffie-Hellman included. Xenqube helps organizations migrate to NIST-standardized post-quantum cryptographic algorithms now, protecting Web3 infrastructure, AI systems, and enterprise data before quantum advantage arrives.
The Threat Landscape
Why PQC Matters Now
Harvest-now, decrypt-later
Adversaries are already collecting encrypted traffic and signed data today, with the intent to decrypt it when quantum computers become capable. Data with long shelf life is already at risk.
Blockchain signatures are vulnerable
ECDSA — the signature scheme used by Ethereum, Bitcoin, and most EVM chains — is broken by Shor's algorithm on a sufficiently powerful quantum computer. Smart contract wallets and key management need migration paths.
NIST standards are here
NIST finalized its first PQC standards in 2024: ML-KEM (CRYSTALS-Kyber), ML-DSA (CRYSTALS-Dilithium), and SLH-DSA (SPHINCS+). Migration can begin now on existing infrastructure.
Core Capabilities
What We Build with PQC
Signatures
Quantum-Resistant Signatures
ML-DSA / CRYSTALS-Dilithium and SPHINCS+ implementations for transaction signing, contract authorization, and document attestation — replacing ECDSA where migration is feasible.
Secure Channels
Quantum VPN & Secure Tunnels
Post-quantum TLS handshakes and encrypted communication channels for inter-service, agent-to-contract, and cross-border payment corridors.
Quantum VPN Use Case →Web3 + PQC
PQC-Hardened Web3 Infrastructure
Applying PQC to wallet architectures, multi-sig schemes, bridge security, and on-chain governance — protecting assets against future quantum attacks.
Web3 Technology →AI + PQC
Quantum-Safe AI Pipelines
Securing AI model communication, inference endpoint authentication, and agent-to-agent protocols with post-quantum primitives to prevent model theft and manipulation.
AI Technology →Audit
Cryptographic Resilience Audit
Systematic inventory of classical cryptography in use across your stack, risk rating against quantum threat timelines, and a prioritized migration roadmap.
Security & Audits →Technical Reference
NIST PQC Algorithms We Implement
ML-KEM
Key encapsulation (CRYSTALS-Kyber). Used for secure key exchange and hybrid TLS.
ML-DSA
Digital signatures (CRYSTALS-Dilithium). Replaces ECDSA for transaction and document signing.
SLH-DSA
Hash-based signatures (SPHINCS+). Stateless, conservative-security option for long-lived credentials.
FN-DSA
Compact lattice signatures (FALCON). Efficient signing for resource-constrained environments.
Use Cases
PQC in Production
Network
Quantum VPN Infrastructure
PQC-hardened VPN tunnels with hybrid key exchange for enterprise and cross-border payment corridors.
OS Security
Security OS Delivery
Hardened operating system layer with PQC key management, secure boot, and cryptographic integrity monitoring.
Audit
Cryptographic Resilience Audit
Inventory your classical cryptography exposure, quantify quantum risk, and build a migration roadmap.