This document provides detailed information about the security features and considerations of the PQC-IIoT crate.

• Cryptographic Primitives
• Protocol Security
• Implementation Security
• Best Practices
• Threat Model
• Security Considerations

• NIST Round 3 finalist
• Security levels:
  • Kyber512 (Level 1)
  • Kyber768 (Level 3, recommended)
  • Kyber1024 (Level 5)
• Based on Module-LWE
• Constant-time implementation
• Side-channel resistant

• NIST Round 3 finalist
• Security levels:
  • LightSaber (Level 1)
  • Saber (Level 3, recommended)
  • FireSaber (Level 5)
• Based on Module-LWR
• Optimized for embedded systems
• Constant-time implementation

• Code-based KEM
• Security levels:
  • Level 1 (experimental)
  • Level 3 (experimental)
  • Level 5 (experimental)
• For research purposes
• Not recommended for production use

• NIST Round 3 finalist
• Security levels:
  • Falcon-512 (Level 1)
  • Falcon-1024 (Level 5)
• Based on NTRU lattices
• Compact signatures
• Fast verification

• NIST Round 3 finalist
• Security levels:
  • Dilithium2 (Level 2)
  • Dilithium3 (Level 3, recommended)
  • Dilithium5 (Level 5)
• Based on Module-LWE
• Balanced performance
• Robust implementation

• Post-quantum key exchange
• Message authentication
• Replay protection
• Topic validation
• Access control

• Post-quantum key exchange
• Message authentication
• Resource protection
• Path validation
• Access control

• Stack allocation where possible
• Zeroization of sensitive data
• Bounds checking
• No undefined behavior

• Constant-time operations
• Memory access patterns
• Branch-free code
• Cache timing protection

• Secure error reporting
• No information leakage
• Graceful failure
• Recovery mechanisms

1. Generation

   // Use recommended security levels
   let kyber = Kyber::new(KyberSecurityLevel::Kyber768);
   let falcon = Falcon::new(FalconSecurityLevel::Falcon512);

2. Storage

   // Store keys securely
   key_storage.store_public_key(&pk)?;
   key_storage.store_secret_key(&sk)?;

3. Rotation

   // Configure key rotation
   kyber.with_key_rotation_interval(Duration::from_secs(3600));

1. MQTT

   // Configure secure client
   let client = SecureMqttClient::new("localhost", 1883, "client_id")?
       .with_tls_config(tls_config)?
       .with_acl(acl_rules)?;

2. CoAP

   // Configure secure client
   let client = SecureCoapClient::new()?
       .with_dtls_config(dtls_config)?
       .with_acl(acl_rules)?;

• Quantum computing attacks
• Classical cryptanalysis
• Side-channel attacks
• Fault injection

• Man-in-the-middle
• Replay attacks
• Denial of service
• Eavesdropping

• Memory corruption
• Timing attacks
• Power analysis
• Fault injection

• 32-bit processor
• 32KB RAM minimum
• 128KB Flash minimum
• Hardware RNG

• Key generation time
• Encryption/decryption time
• Signature/verification time
• Memory usage

1. Assessment

   • Evaluate security requirements
   • Choose appropriate algorithms
   • Configure security levels

2. Implementation

   • Follow best practices
   • Enable security features
   • Configure monitoring

3. Maintenance

   • Regular updates
   • Key rotation
   • Security audits

1. Monitor security advisories
2. Evaluate impact
3. Plan updates
4. Test changes

1. Review patches
2. Test updates
3. Deploy changes
4. Verify security

1. Detect incidents
2. Assess impact
3. Contain threat
4. Recover systems
5. Learn from incident