QSA Technology’s chips are the possession factor of the future. Bound to a photonic hardware root of trust and grounded in quantum physics, they give optical networks an authentication layer no digital credential can match.
A secure connection rests on two things: encryption, which keeps a message private, and authentication, which confirms who you’re actually talking to. Encryption without authentication means you’re sharing secrets with someone, but you don’t know who. QSA works on the second half, the part that’s still largely unsolved at the hardware level.
It sits alongside whatever’s already protecting the link, the same way two-factor authentication on a phone doesn’t replace the password, but makes it worthless if stolen. The difference is what QSA uses as the second factor: not a code generated by software, but an unclonable physical structure baked into the chip itself, verified by physics rather than by another digital secret sitting next to the first one.
QSA lives at the optical interface of each node, not inside its routing, switching or compute. Electronic roots of trust sit in the compute. QSA checks who’s at the door: the transceiver, where the device meets the optical network. Together they cover both. The same principle applies whether the link runs through fibre or free space, since the readout only needs light, not a particular medium to carry it.
Each module is enrolled once, in a public database. When two nodes set up a connection, a short optical exchange through their modules confirms that the node on the other end is genuinely the one it claims to be. Like PKI-based trust, this means any node carrying a chip becomes part of a larger trusted network, without adding complexity as that network grows. Operating the network barely changes; what an attacker can get away with does.
Physical, quantum-secure authentication for the QKD control channel and its trusted nodes, closing an authentication gap that preshared keys and post-quantum cryptography each only partly address. This is the market QSA was originally founded to serve.
Hardware-rooted authentication for high-value datacenter interconnects and metro links, without adding key-management overhead as the network grows.
A lightweight way to authenticate distributed, often physically exposed nodes, from field sensors to unmanned platforms, with no shared digital secret at risk of capture. Because the readout is purely optical, it stays immune to RF jamming and denial in contested electronic-warfare environments.
Device-level trust for energy, industrial, and utility networks, where authentication has to hold even when a node is physically reachable by an adversary.
Our near-term focus here is on the ground segment: authenticating the terrestrial links and ground stations satellite operators already depend on. Extending the same principle to space-based links is the longer-term direction.
The same unclonable structure can serve as an embedded fingerprint chip, verifying that a piece of high-end communication hardware is genuine rather than counterfeit or tampered with, for sectors like defense and transport where provenance matters as much as connectivity.
If your systems depend on establishing trust over an optical link, there’s a good chance QSA fits. Start with a feasibility pilot on your own link, or tell us about your application and we’ll work out the rest together.