USMHACS Full System View
The full USMHACS interface includes an interactive hardware logic diagram, signal-flow simulation, and event console for scenario validation.
Open Full System View
Best viewed on larger screens.
USMHACS - Hardware Deterministic Security System
Hardware-enforced access control architecture with deterministic logic execution and tamper-resilient lockout.
USMHACS HARDWARE SECURITY DIAGRAM
System Console Log
Logic Execution Flow
Sensors->Key->Code->Delay->Tamper->AND->Unlock
Access is granted only when every gate reports a valid hardware condition.
Attack Handling
- Brute force attempt -> lockout latch triggered.
- Environment breach -> tamper latch preserved until safe reset.
- Wrong code sequence -> authentication rejected and path blocked.
Engineering Decisions
- No MCU -> eliminates software attack surface
- SR latch -> persistent tamper memory.
- Delay block -> prevents rapid retry abuse.
- Decoder/logic path -> deterministic access behavior.
Security Philosophy
Hardware-enforced deterministic security eliminates software vulnerabilities and ensures predictable system behavior.