Prometheus Security Group Global (PSG) announced a technology partnership with Mercury Security on August 27, 2026, aimed at extending Zero Trust principles down to the field-device level of physical security systems, according to the companies’ announcement and independent reporting from Security Systems News.
Combining Access Hardware With Edge Authentication
The partnership pairs Mercury’s open-architecture access-control hardware platform with PSG’s patented technology for embedding cryptographic identity, authentication and verification directly into far-edge field devices, including door readers, sensors and cameras. PSG describes the goal as moving physical security systems away from assumed, unverified inputs toward authenticated and cryptographically verified data starting at the point where it is generated, rather than only securing the network layer above it.
Why Now
The move extends a Zero Trust architecture approach that IT security teams have used for years, in which every device and request is continuously authenticated rather than implicitly trusted once inside a network perimeter, into physical and operational technology environments. PSG has previously supplied Zero Trust physical security technology to U.S. Air Force, Navy and Department of Energy programs, and has positioned far-edge authentication as a way to close a gap security researchers have flagged in converging IT and physical access control systems, where edge hardware has often remained a weaker link than the software managing it.
What It Means for Integrators
For organizations running Mercury-based access control, the partnership is intended to let them add cryptographic device-level verification without replacing existing access-control investments, addressing a common friction point in critical-infrastructure and high-security environments where wholesale hardware replacement is often impractical.
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