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SECURITY.md

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Security Guidelines for RealGibberLink

Overview

RealGibberLink implements a comprehensive security architecture designed for air-gapped, short-range communication between robots and drones. The system combines hardware security, cryptographic protocols, and adaptive error correction to ensure secure, reliable communication in challenging environments.

Current Security Measures

Hardware Security Module

The system includes a hardware security manager that interfaces with Hardware Security Modules (HSMs), Trusted Platform Modules (TPMs), and secure elements:

  • HSM Device Management: Support for registering and managing multiple HSM devices with configurable capabilities (key generation, signing, encryption)
  • Hardware-Backed Key Generation: Generation of AES-256, RSA (2048/4096), and EC (P-256/P-384) keys using hardware security modules
  • Hardware-Backed Signing: Digital signatures using HSM-protected private keys with HMAC-SHA256 simulation
  • Secure Boot Verification: Boot chain integrity verification (currently simulated)
  • Hardware Attestation: Remote attestation with PCR-like measurements, device integrity reporting, and cryptographic signatures

Note: Hardware security features are currently simulated in software for development. Production deployments should integrate with actual TPM/HSM hardware.

Cryptographic Engine

The cryptographic foundation uses modern, quantum-resistant algorithms:

  • Key Exchange: ECDH (X25519) with automatic key rotation for forward secrecy
  • Symmetric Encryption: AES-256-GCM for authenticated encryption
  • Digital Signatures: Ed25519 for log signing and data authentication
  • Message Authentication: HMAC-SHA256 for integrity verification
  • Key Derivation: HKDF-SHA256 for secure key expansion
  • Post-Quantum Support: Optional Kyber (KEM) and Dilithium (signatures) when post-quantum feature is enabled
  • Hybrid Cryptography: Combined classical and post-quantum algorithms for enhanced security

Authentication System

User and device authentication with robust protection against common attacks:

  • PIN-Based Authentication: Configurable PIN policies with complexity requirements
  • Account Lockout: Progressive lockout after failed attempts (default: 3 attempts, 5-minute lockout)
  • Weak PIN Detection: Prevention of common, sequential, and repeated PIN patterns
  • Secure PIN Storage: HMAC-based hashing with salt for PIN storage
  • Session Management: Authentication state tracking with timeout handling

Access Control and Permissions

Role-based access control system with environmental constraints:

  • Permission Types: Read, Write, Execute, Admin, Configure, Monitor, Audit
  • Permission Scopes: System, Communication, Mission, Security, Audit, All
  • Role-Based Access: Operator, Admin, and Security roles with predefined permissions
  • Peer Trust Levels: Unknown, Low, Medium, High, Critical trust classification
  • Environmental Validation: Permission checks based on location security, network security, and device integrity
  • Constraint-Based Grants: Time-limited, location-restricted, and context-aware permissions

Security Policy Engine

Dynamic security policy enforcement with rule-based evaluation:

  • Policy Conditions: Time ranges, location restrictions, user roles, device types, network security
  • Policy Actions: Allow, Deny, Log, Alert, Block, RequireApproval
  • Violation Tracking: Policy violation recording with severity levels (Low, Medium, High, Critical)
  • Default Policies: Business hours access, secure location requirements, admin role restrictions

Optical Error Correction and Security

Multi-layer error correction specifically designed for optical channel security:

  • Reed-Solomon Codes: Configurable data/parity shard ratios (default: 16/8)
  • Convolutional Codes: Rate-adaptive convolutional encoding (1/2, 2/3, 3/4 rates)
  • Block Interleaving: Burst error protection with configurable block sizes and depths
  • Adaptive ECC: Real-time parameter adjustment based on atmospheric conditions (clear, fog, rain, turbulence)
  • Error Pattern Analysis: Atmospheric interference detection using burst error and density analysis
  • Quality Monitoring: BER, PER, signal strength, and attenuation tracking
  • Range-Based Adaptation: Short (50-100m), Medium (100-150m), Long (150-200m) range categories

Protocol Security

Communication protocol security measures:

  • Nonce-Based Protection: Anti-replay protection with short validity windows
  • Cross-MAC Validation: Multi-channel authentication binding
  • HMAC Authentication: Message integrity for control channels
  • Session Key Management: Ephemeral keys with 5-second TTL
  • Channel Binding: Cryptographic binding between laser and ultrasonic channels

Planned Security Enhancements

Hardware Integration

  • Direct TPM 2.0 integration for secure key storage
  • Secure element (TEE) support for mobile deployments
  • Hardware-backed random number generation
  • Secure boot chain measurement and verification

Advanced Cryptographic Features

  • Full post-quantum algorithm implementation by default
  • Threshold cryptography for distributed key management
  • Homomorphic encryption for privacy-preserving operations
  • Zero-knowledge proofs for authentication

Network Security

  • TLS 1.3 support for network communications
  • Certificate pinning and rotation
  • Network segmentation for sensitive components
  • DDoS protection and rate limiting

Operational Security

  • Security Information and Event Management (SIEM) integration
  • Automated incident response workflows
  • Security orchestration and automation
  • Continuous compliance monitoring

Supply Chain Security

  • Software Bill of Materials (SBOM) generation
  • Dependency vulnerability scanning
  • Secure software update mechanisms
  • Third-party component verification

Security Testing

Automated Testing

  • Cryptographic function unit tests
  • Protocol security validation
  • Fuzz testing for cryptographic parsers
  • Property-based testing for security invariants

Manual Security Review

  • Code review with security checklists
  • Threat modeling sessions
  • Penetration testing of protocol implementations
  • Side-channel attack analysis

Vulnerability Management

Reporting

Security vulnerabilities should be reported via email to security@realgibber.com using PGP encryption. The project follows coordinated disclosure with a 90-day remediation window.

Classification

  • Critical: Remote code execution, authentication bypass
  • High: Privilege escalation, significant data exposure
  • Medium: Information disclosure, limited impact
  • Low: Minor issues with limited impact

Security is everyone's responsibility. Thank you for helping keep RealGibberLink secure.