🔑 AccessManager: Administrative Override & Identity Service

AccessManager is a high-assurance identity and authorization service designed for collaborative robotics (cobots). It provides a secure 2-FA Handshake and Temporal Watchdog logic to manage manual overrides in industrial environments without compromising ISO 15066 safety integrity.

📊 Access Status Dashboard

Real-time ANSI-colored telemetry captured during a high-integrity system audit.

🟢 STATE: SAFE	🟡 STATE: OVERRIDE	🔴 STATE: TIMEOUT
Standard Guards Active	Maintenance/Admin Mode	Watchdog Expired
Logic: is_override == False	Logic: 2-FA Handshake == PASS	Logic: Elapsed > 300s
Action: ISO 15066 Active	Action: Supervised Compliance	Action: Secure Auto-Logout

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🏗️ System Architecture

The module is architected using the PACE standard to ensure identity resilience during critical lab procedures.

1. 🛡️ 2-FA Handshake (Logic Gate)

Implements a multi-factor authentication protocol requiring both a physical token (badge_id) and a confirmed voice command (voice_intent).

• Tiered Clearance: Maps operators to specific compliance constants (TIER_1 to TIER_3).
• Identity Mapping: Integrates with a local auth cache for deterministic offline verification.

2. 🐕‍🦺 5-Minute Watchdog (The Pulse)

A temporal monitor that ensures the system never remains in a "Compliant Override" state if the operator abandons the workstation.

• Heartbeat: Continually verified by the VisionProcessor (Neuro-Grasp).
• Auto-Reversion: If operator_present is False for > 300 seconds, the system triggers an emergency state purge.

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✅ Quality Assurance & Verification

Metric	Status	Standard
Static Analysis	10.00/10	Pylint (PEP 8 Strict)
Unit Testing	18/18 PASSED	unittest (Stress Tested Boundaries)
Auth Protocol	2-FA	Badge + Voice Intent Multi-Factor
Reliability	PACE	Self-healing Auth Cache

Automated Stress Test Battery

The system includes test_access_manager.py, covering 18 critical scenarios:

1. Identity Tiers: Validates upgrade/downgrade paths between Maintenance and Admin levels.
2. Temporal Boundaries: Verifies watchdog triggers at exactly T+301s.
3. Input Resilience: Tests malformed, null, and case-insensitive string handling.
4. Chaos Engineering: Simulates signal loss to ensure the system defaults to "Secure Mode."

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🚀 Usage

1. Run System Audit

The diagnostic simulation demonstrates a full lifecycle from badge-in to auto-timeout:

python access_manager.py

2. Run Stress Tests

python test_access_manager.py

🛠️ Configuration

Authorization constants are managed via frozen Dataclasses to prevent runtime identity spoofing.

@dataclass(frozen=True)
class AccessConfig:
    MAINTENANCE_TIMEOUT_SEC: float = 300.0  # 5-Minute Watchdog
    auth_cache: Dict[str, str] = field(default_factory=lambda: {
        "ARCH-001": "Senior Architect"
    })

📦 Dependencies

• Python 3.10+ (Dataclass support)
• Standard Library (Zero-dependency deployment)

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Author: Charles Austin (Principal Solutions Architect) Focus: Robotics Identity Management, Human-Robot Interaction (HRI), PACE Fault-Tolerance