SpaceComputer has opened public access to the quantum-safe key management service (KMS) it is developing for Space Fabric, its planned secure space internet platform. Starting today, anyone with a Gmail account can test the login system ahead of a planned orbital deployment in the first quarter of 2027.
According to SpaceComputer, this KMS system is designed as an initial foundational step for space-compatible Post-Quantum Cryptography (PQC) software architectures that can securely connect to ground stations around the world. It also represents the first steps to space connectivity and onboarding users to Space Fabric.
The company describes the system as a foundational element for multi-tenant satellite and payload operations, in which multiple organizations or workloads share space-based infrastructure. However, each individual tenant is provided with independent key management and cryptographic isolation. The approach is intended to allow multiple payload users to share a satellite or mission without requiring each participant to rely on the security controls or trust assumptions of the others.
Multi-tenant payloads, says SpaceComputer, are increasingly being considered as a way to make more efficient use of limited spacecraft capacity. Rather than dedicating an entire satellite or payload to a single application, operators can potentially host multiple workloads on the same infrastructure.
Joint authorization between Earth and orbit
A central feature of the proposed architecture is a requirement for authorization to be shared between terrestrial and space-based components.
SpaceComputer says the KMS will be designed so that neither an Earth-based system nor an orbital system can independently authorize certain actions. Instead, authorization would require joint approval through mechanisms such as threshold signatures or explicit co-signing.
The company says this approach is intended to reduce the risk associated with compromising a single domain and to establish an additional security boundary between ground infrastructure and spacecraft.
The public release of the login system is intended to provide an opportunity to test the architecture and gather operational experience ahead of an in-orbit demonstration that SpaceComputer is targeting for 2027.
SpaceComputer says its objective is not to replace established terrestrial KMS products, but to adapt the KMS model for environments in which cryptographic infrastructure must eventually operate across both terrestrial and orbital domains.
“Space is still expensive, capacity-constrained, and far from being widely accessible. Starship class reusable rockets will eventually unlock extraordinary launch throughput, but that future is not here yet. We’re building SpaceKMS to bring the benefits of space grade security now through account management,” said Daniel Bar, SpaceComputer co-founder and CEO.
Filip Rezabek, SpaceComputer co-founder and CTO, said the company sees the project as an extension of existing terrestrial key-management approaches rather than a replacement for them.
“There are already strong KMS solutions on Earth. Our goal is not to replace them for the sake of building another key vault. Rather we seek to extend the KMS model with capabilities we see becoming increasingly strategically significant to making those capabilities portable –toward a space-native deployment model,” he said.
