Threat Model

Ghostline's security is designed around a comprehensive threat model that addresses various attack vectors and security concerns.

Threat Categories

Network Attacks

Man-in-the-Middle (MITM):

Threat: Intercept and modify communications
Mitigation: TLS 1.3, certificate pinning, encrypted protocols
Impact: Low (encrypted communications)

Traffic Analysis:

Threat: Analyze network traffic patterns
Mitigation: Tor routing, traffic padding, timing obfuscation
Impact: Medium (metadata exposure)

DNS Attacks:

Threat: DNS hijacking or spoofing
Mitigation: Encrypted DNS (DoH/DoT), DNS validation
Impact: Medium (routing attacks)

Server Attacks

Server Compromise:

Threat: Unauthorized server access
Mitigation: Encrypted data, no key access, minimal data collection
Impact: Low (encrypted data, no keys)

Data Breach:

Threat: Unauthorized data access
Mitigation: Encryption at rest, access controls, audit logs
Impact: Low (encrypted data)

Denial of Service:

Threat: Service disruption
Mitigation: DDoS protection, rate limiting, redundancy
Impact: Medium (service availability)

Client Attacks

Device Compromise:

Threat: Malicious software on device
Mitigation: Local encryption, secure storage, app sandboxing
Impact: Medium (local data access)

Key Extraction:

Threat: Extract keys from device
Mitigation: Hardware security, key protection, secure storage
Impact: High (key compromise)

Phishing:

Threat: Trick users into revealing credentials
Mitigation: User education, verification, multi-factor auth
Impact: Medium (credential theft)

Cryptographic Attacks

Key Compromise:

Threat: Cryptographic key theft
Mitigation: Perfect forward secrecy, key rotation, MPC
Impact: High (but mitigated by PFS)

Weak Cryptography:

Threat: Weak encryption algorithms
Mitigation: Strong algorithms, regular updates, security audits
Impact: High (but mitigated by strong crypto)

Implementation Bugs:

Threat: Cryptographic implementation errors
Mitigation: Security audits, code review, testing
Impact: High (but mitigated by audits)

Attack Scenarios

Scenario 1: Server Compromise

Attack:

Attacker gains access to Ghostline servers
Attempts to access user data

Mitigation:

All data encrypted at rest
Servers don't have access to keys
Minimal data collection
Audit logs detect unauthorized access

Impact: Low - Attacker cannot decrypt user data

Scenario 2: Network Interception

Attack:

Attacker intercepts network traffic
Attempts to read or modify communications

Mitigation:

All traffic encrypted (TLS 1.3)
End-to-end encryption for messages
Certificate pinning
Encrypted protocols

Impact: Low - Traffic is encrypted

Scenario 3: Device Compromise

Attack:

Malicious software on user device
Attempts to access local data

Mitigation:

Local data encrypted
Secure storage
App sandboxing
Hardware security (optional)

Impact: Medium - Local data may be accessible

Scenario 4: Key Theft

Attack:

Attacker steals cryptographic keys
Attempts to decrypt past or future messages

Mitigation:

Perfect forward secrecy
Key rotation
MPC (no single key)
Hardware security

Impact: Low - PFS protects past messages

Security Guarantees

Message Security

Confidentiality: Messages encrypted end-to-end
Integrity: Message integrity verified
Authenticity: Sender authentication
Forward Secrecy: Past messages remain secure

Wallet Security

Key Security: Keys protected by MPC
Transaction Security: Cryptographically signed
Privacy: Confidential transfers available
Recovery: Secure recovery mechanisms

Browser Security

Fingerprint Protection: Anti-fingerprinting
Tracking Prevention: Tracker blocking
Privacy: Anonymous routing available
Security: HTTPS enforcement

Banking Security

Account Security: Encrypted accounts
Transaction Security: Cryptographically secured
Privacy: Confidential transactions
Compliance: Regulatory compliance

Security Measures

Encryption

End-to-End: All data encrypted
At Rest: Encrypted storage
In Transit: Encrypted communication
Key Management: Secure key management

Authentication

Multi-Factor: MFA support
Hardware Keys: Hardware security keys
Biometric: Biometric authentication
Session Management: Secure sessions

Access Control

Least Privilege: Minimal permissions
Role-Based: Role-based access
Audit Logs: Complete audit trails
Monitoring: Anomaly detection

Security Updates

Regular Updates: Security patches
Vulnerability Management: Bug fixes
Security Audits: Regular audits
Incident Response: Response procedures

Security Best Practices

For Users

Keep app updated
Use strong authentication
Enable security features
Review privacy settings
Be cautious with permissions

For Developers

Follow security guidelines
Use secure coding practices
Regular security testing
Keep dependencies updated
Report vulnerabilities