UK cyber security consultancy / EPIC28 Ltd

Security you can prove.

EPIC28 is a cyber security consultancy serving banking, healthcare, manufacturing, retail and government. We design security architecture, advise on AI security, and build products that turn security claims into evidence. Our first product is Raucle.

Work with us Explore Raucle
01 / Why EPIC28

Our clients answer to regulators, boards, card schemes and supply-chain auditors. The standard they are held to is the same: prove it. We design security so that the answer exists.

The practice

Advisory
01

Security architecture

Target-state architecture, design reviews, control mapping and delivery roadmaps. We work to SABSA and to the standards your sector already recognises, and we stay engaged through build and operation, not just the review board.

02

AI security advisory

We advise on securing AI systems and the agents that act on your behalf, from model selection to enforcement of what agents are permitted to do. Our advisory work aligns to the Code of Practice for the Security of AI, ETSI EN 304 223 and EU AI Act Article 12.

03

Assurance and audit readiness

We design evidence trails that show controls operating, in a form an auditor, regulator or customer can verify independently.

Products

01 / Raucle

Raucle.

Raucle came out of our advisory work. It gates every tool call an AI agent makes against a signed, least-privilege capability, and records each decision as a cryptographic receipt. Receipts are immutable and can be verified offline by any auditor, regulator or partner, without contacting us. Documentation, the specification and a live demo are at raucle.com.

raucle.com — the product site github.com/epic28-ltd/raucle
100%
of attempted tool-call hijacks blocked in benchmark testing (AgentDojo)
69 µs
median overhead per gated call
4+
agent frameworks supported today
Apache-2.0
open source, with formal proofs and benchmarks published
See it running
The live topology view, policy decisions as they happen, and signed receipts: all visible in the product's own guided demo.
Open the live demo

About

EPIC28 Ltd is a cyber security consultancy. We design security architecture for regulated organisations and build products that produce evidence, not assertions.

Our consultants have spent twenty-five years in banking and capital markets, central government and defence, manufacturing, retail, telecoms and software security.

Raucle, the product above, is the result: open source under Apache-2.0.

Contact

Contact EPIC28

For engagements, Raucle deployments or press, use the address that fits. Every message reaches a consultant.

Engagements and Raucle[email protected]