Future-proof quantum security for critical infrastructure. Now.
Everything we do online depends on encryption, and the encryption in use today will not survive quantum computers. Traffic that is recorded now can be read later, once those machines exist.
Quantasphere exists so that the networks a country depends on stay private through that change. We build an integrated hardware and software system: appliances that sit beside the equipment operators already run and add quantum-safe protection underneath it, and quantum random number generators that supply the randomness every key depends on. Hospitals, power grids, banks, telecommunications operators, utilities and government networks can move to post-quantum security without rebuilding what they have.
Securing networks today. Building the trustless network of tomorrow.
Quantum Secure Encryption
Tessera is a network encryption gateway that adds a post-quantum layer inside the tunnels you already operate. Your routing, addressing and firewall rules stay exactly as they are.
Quantum Random Number Generation
Aevum generates cryptographic randomness from measured quantum events and proves its quality while running. The range spans 100 Mbps to 40 Gbps in discrete and continuous output modes.
Everything encrypted today is already being stolen for tomorrow.
An adversary that records your encrypted traffic today does not need to break it today. Once a cryptographically relevant quantum computer exists, everything recorded in the meantime becomes readable. Security agencies call this Harvest Now, Decrypt Later. For data that stays sensitive for decades, such as patient records, grid topologies and defense communications, the exposure has already started.
Governments have set the deadlines.
The US, EU, KSA and France have set deadlines that convert quantum risk into mandatory procurement.
Sources: NIST FIPS 203/204/205 (2024) · KSA National Cybersecurity Authority, NCS 2:2025 · NSA CNSA 2.0 (2026 / 2030) · EU coordinated PQC roadmap (2027) · ANSSI post-quantum position (2027 / 2030)
Running on real networks, not in a lab.
Tessera runs today on customer networks in healthcare, defense and energy, and is built for every critical-infrastructure sector. Each deployment follows the same pattern: sites connect in days, existing systems keep operating throughout, and the network switches over in one short, planned cutover.
Healthcare
Multi-site hospital networks, where patient records stay sensitive far longer than current encryption will hold. Multiple sites connected, full integration within a week.
Defense
The most demanding security context there is: strict compliance requirements, and a buyer that verifies vendor-blindness rather than taking it on trust.
Energy
Multi-site protection for grid infrastructure, where links between substations and control centres must run uninterrupted while gaining a post-quantum layer.
Telecommunications
Carrier backbones and inter-site links carry every other sector's traffic. Protecting them once protects everything routed across them.
Utilities
Water, gas and district networks run the same control-system links as the grid, often with longer equipment lifetimes and fewer maintenance windows.
Financial services
Settlement, clearing and inter-bank traffic crosses organisational boundaries, which is exactly the case a secretless broker was designed for.