Cepheus Space secures space missions. We help NewSpace teams, satellite operators and government programmes understand their cyber risk and build security in, from first design to daily operations.
Nation-state actors, criminal syndicates, and hacktivists have turned orbital infrastructure into a prime target. GPS spoofing, uplink jamming, firmware implants, and command injection attacks against satellites are no longer hypothetical. They happen daily.
Space missions are moving faster than their security. Startups launch on tight budgets, operators run ground systems designed before today's threats, and government programmes face rising security requirements. Cepheus Space exists to close that gap, with security expertise built specifically for space systems.
We work with the constraints of space: limited bandwidth, long latencies, and spacecraft you can't easily patch once they're in orbit
Our work is grounded in real adversary behaviour, mapped to SPARTA, the attack framework built for space systems
Security decisions made during mission design cost a fraction of fixes after launch. We help you get them right early
From the first design review to daily operations: the services we're launching with, and what's coming next.
Space-domain threat advisories covering spacecraft, ground stations, communication links and user equipment. Each advisory gives a clear severity, the systems affected and recommended actions, mapped to SPARTA techniques so your team can act on it.
Threat modelling and risk assessments of your space and ground segments using SPARTA, plus penetration testing of ground systems, mission software and operator networks.
Talk to us about an assessment →Secure-by-design reviews for new missions, and readiness for the frameworks your customers and regulators expect, such as NIST guidance for commercial satellite operations and ISO/IEC 27001.
Talk to us about consulting →Continuous monitoring of your ground segment and mission operations by analysts who understand space systems. We're designing it now, together with our first partners.
Join the early-access list →We're working with a small group of early partners. Help shape our services, and get hands-on support from our team.
Talk to UsSpace security needs more than repurposed IT tools. Our approach is built around how space systems are designed, operated and attacked.
We map your mission (spacecraft, ground segment, communication links and users) against SPARTA to find the attack paths that matter most, then prioritise fixes by their impact on the mission rather than generic risk scores.
Security decisions made during design are far cheaper than fixes once you're in orbit. We review architectures, command authentication, key management, supply chain and post-quantum readiness before launch.
We track threats to space systems and publish advisories with severity, affected segments and recommended actions. Each one is mapped to SPARTA techniques, so your team can connect it to its own threat model.
Our planned managed SOC will monitor ground systems and mission operations, combining space-domain threat intelligence with analysts who understand satellites. We're designing it now with our first partners.
Whether you're preparing a first launch or running a national programme, we start where you are.
We're shaping our services with a small group of founding partners. You get direct access to our team and a say in what we build next. We get real-world feedback from people securing real missions. If that sounds useful, let's talk.
Security built in from the start and sized for small teams and tight budgets, so it supports your launch timeline and the due diligence that comes with funding.
Threat intelligence for your mission, assessments of ground systems and operations, and a path to continuous monitoring as your fleet grows.
Independent assessments and compliance readiness for programmes that must meet strict security and regulatory requirements.
Whether you're designing your first satellite or operating a fleet, if it's in orbit it's a target. Tell us about your mission and we'll set up a call.