# SMOA Security Architecture **Version:** 1.0 **Last Updated:** 2024-12-20 **Status:** Draft - In Progress **Classification:** Internal Use --- ## Security Overview ### Security Objectives - Protect sensitive data at rest and in transit - Ensure strong authentication and authorization - Maintain audit trail for compliance - Enable secure offline operations - Support secure inter-agency communications ### Security Principles - **Defense in Depth:** Multiple layers of security controls - **Least Privilege:** Minimum necessary access - **Zero Trust:** Verify all access requests - **Security by Design:** Security built into architecture - **Continuous Monitoring:** Ongoing security monitoring ### Threat Model See [Threat Model Document](SMOA-Threat-Model.md) for detailed threat analysis. --- ## Authentication Architecture ### Multi-Factor Authentication SMOA requires three concurrent authentication factors: 1. **Knowledge Factor (PIN)** - 6-12 digit numeric PIN - Complexity requirements enforced - Retry limits and lockout thresholds - Hardware-backed storage 2. **Biometric Factor (Fingerprint)** - Hardware-backed fingerprint verification - Secure OS biometric subsystem - Non-exportable biometric data - Liveness detection 3. **Biometric Factor (Facial Recognition)** - Hardware-backed facial recognition - Secure OS biometric subsystem - Non-exportable biometric data - Anti-spoofing measures ### Authentication Flow ``` User → PIN Entry → Fingerprint Scan → Facial Recognition → Authentication Success ↓ Hardware-Backed Verification ↓ Session Creation ``` ### Session Management - **Session Creation:** After successful authentication - **Session Timeout:** Configurable inactivity timeout - **Session Renewal:** Automatic renewal during activity - **Session Lock:** Lock on backgrounding, fold state change, security events - **Re-authentication:** Required for sensitive operations ### Re-authentication Triggers - Period of inactivity (configurable) - Device fold state change (policy-defined) - Security signal detection - Sensitive operation access: - Credential display - Secure communications initiation - VPN/browser access - Order creation/modification - Evidence custody transfer --- ## Authorization Architecture ### Role-Based Access Control (RBAC) #### Role Hierarchy - **Administrator:** Full system access - **Operator:** Standard operational access - **Viewer:** Read-only access - **Auditor:** Audit and reporting access - **Custom Roles:** Domain-specific roles (LE, Military, Judicial, Intelligence) #### Permission Model - **Module-Level Permissions:** Access to entire modules - **Feature-Level Permissions:** Access to specific features - **Data-Level Permissions:** Access to specific data - **Operation-Level Permissions:** Permission to perform operations #### Policy Enforcement - **Policy Engine:** Centralized policy enforcement - **Dynamic Policies:** Policies updated on connectivity - **Offline Policies:** Cached policies for offline operation - **Policy Validation:** Continuous policy validation ### Access Control Points 1. **Application Entry:** Authentication required 2. **Module Access:** Role-based module access 3. **Feature Access:** Feature-level permissions 4. **Data Access:** Data-level permissions 5. **Operation Access:** Operation-level permissions --- ## Cryptographic Architecture ### Encryption at Rest #### Data Encryption - **Algorithm:** AES-256-GCM - **Key Storage:** Hardware-backed (Android Keystore) - **Key Management:** Automatic key rotation - **Scope:** All sensitive data #### Database Encryption - **Room Database:** Encrypted SQLite - **Encryption Key:** Hardware-backed key - **Key Binding:** Bound to device and user authentication state #### File Encryption - **Sensitive Files:** Encrypted file storage - **Key Management:** Per-file encryption keys - **Access Control:** File-level access control ### Encryption in Transit #### Transport Layer Security - **Protocol:** TLS 1.2 or higher - **Cipher Suites:** Strong cipher suites only - **Certificate Pinning:** Certificate pinning for critical endpoints - **Mutual Authentication:** Mutual TLS where required #### VPN Requirements - **Mandatory VPN:** Required for browser module - **VPN Configuration:** Managed VPN configuration - **VPN Monitoring:** VPN connection monitoring ### Key Management #### Key Storage - **Hardware-Backed:** Android Keystore (TEE) - **Key Isolation:** Keys isolated per application - **Key Binding:** Keys bound to device and user - **Non-Exportable:** Keys cannot be exported #### Key Lifecycle - **Key Generation:** Secure key generation - **Key Rotation:** Automatic key rotation - **Key Revocation:** Key revocation on security events - **Key Archival:** Secure key archival #### Key Types - **Data Encryption Keys:** For data at rest - **Transport Keys:** For data in transit - **Signing Keys:** For digital signatures - **Authentication Keys:** For authentication --- ## Certificate Management ### Certificate Lifecycle #### Certificate Installation - **Certificate Sources:** Trusted certificate authorities - **Installation Process:** Secure installation procedures - **Certificate Validation:** Certificate chain validation - **Certificate Storage:** Secure certificate storage #### Certificate Validation - **Chain Validation:** Full certificate chain validation - **Revocation Checking:** OCSP/CRL checking - **Expiration Monitoring:** Certificate expiration monitoring - **Trust Validation:** Trust list validation #### Certificate Renewal - **Renewal Process:** Automated renewal where possible - **Renewal Notification:** Expiration notifications - **Renewal Procedures:** Manual renewal procedures ### Qualified Certificates (eIDAS) #### Qualified Certificate Support - **QTSP Integration:** Qualified Trust Service Provider integration - **EU Trust Lists:** Validation against EU Trust Lists - **Certificate Validation:** Qualified certificate validation - **Certificate Storage:** Secure qualified certificate storage --- ## Data Protection ### Data Classification #### Classification Levels - **Public:** Publicly accessible data - **Internal:** Internal use only - **Confidential:** Confidential data - **Secret:** Secret data - **Top Secret:** Top secret data #### Classification Enforcement - **Classification Labels:** Data classification labels - **Access Control:** Classification-based access control - **Handling Requirements:** Classification-based handling - **Storage Requirements:** Classification-based storage ### Data Retention #### Retention Policies - **Policy Definition:** Configurable retention policies - **Automatic Deletion:** Automatic deletion per policy - **Retention Periods:** Different periods by data type - **Retention Compliance:** Compliance with retention requirements ### Data Disposal #### Secure Deletion - **Secure Erase:** Cryptographic secure erase - **Key Destruction:** Key destruction on deletion - **Verification:** Deletion verification - **Audit Trail:** Deletion audit trail --- ## Network Security ### Network Architecture #### Network Segregation - **Isolated Networks:** Network isolation where required - **VPN Tunnels:** VPN tunnels for secure communication - **Firewall Rules:** Firewall rule enforcement - **Network Monitoring:** Network traffic monitoring #### Secure Communication - **TLS Encryption:** All external communication encrypted - **Certificate Validation:** Certificate validation - **Connection Security:** Secure connection establishment - **Traffic Analysis:** Protection against traffic analysis ### Network Controls #### Access Controls - **Network Access:** Controlled network access - **Endpoint Security:** Endpoint security requirements - **Network Policies:** Network access policies - **Monitoring:** Network access monitoring --- ## Security Controls ### Security Control Matrix | Control Category | Control | Implementation | Status | |-----------------|---------|----------------|--------| | **Access Control** | Multi-factor authentication | core:auth | ✅ Implemented | | **Access Control** | Role-based access control | core:auth, core:security | ✅ Implemented | | **Access Control** | Session management | core:auth | ✅ Implemented | | **Encryption** | Data at rest encryption | core:security | ✅ Implemented | | **Encryption** | Data in transit encryption | core:security | ✅ Implemented | | **Encryption** | Key management | core:security | ✅ Implemented | | **Audit** | Audit logging | core:security | ✅ Implemented | | **Audit** | Immutable audit records | core:security | ⚠️ Partial | | **Network** | TLS enforcement | core:security | ✅ Implemented | | **Network** | VPN requirements | modules:browser | ✅ Implemented | | **Certificate** | Certificate management | core:certificates | ✅ Implemented | | **Certificate** | OCSP/CRL checking | core:certificates | ⚠️ Partial | ### Control Effectiveness - **Access Controls:** Effective - Multi-factor authentication enforced - **Encryption:** Effective - Hardware-backed encryption - **Audit:** Effective - Comprehensive audit logging - **Network Security:** Effective - TLS and VPN enforcement - **Certificate Management:** Effective - Certificate lifecycle management --- ## Security Monitoring ### Monitoring Capabilities #### Event Monitoring - **Authentication Events:** Monitor all authentication attempts - **Authorization Events:** Monitor authorization decisions - **Security Events:** Monitor security-relevant events - **Anomaly Detection:** Detect anomalous behavior #### Logging - **Security Logs:** Comprehensive security logging - **Audit Logs:** Complete audit trail - **Error Logs:** Security error logging - **Event Correlation:** Event correlation and analysis ### Threat Detection #### Threat Indicators - **Failed Authentication:** Multiple failed authentication attempts - **Unauthorized Access:** Unauthorized access attempts - **Anomalous Behavior:** Unusual user behavior - **Security Violations:** Policy violations #### Response Procedures - **Automated Response:** Automated threat response - **Alert Generation:** Security alert generation - **Incident Escalation:** Incident escalation procedures - **Remediation:** Threat remediation procedures --- ## Compliance ### Security Compliance #### Standards Compliance - **eIDAS:** Multi-factor authentication, qualified certificates - **ISO 27001:** Information security management - **DODI 8500.01:** DoD cybersecurity compliance - **CJIS:** Criminal justice information security #### Compliance Evidence - **Security Controls:** Implemented security controls - **Audit Trails:** Complete audit trails - **Certifications:** Security certifications - **Documentation:** Security documentation --- ## Security Best Practices ### Development Practices - **Secure Coding:** Secure coding practices - **Code Review:** Security code review - **Vulnerability Scanning:** Regular vulnerability scanning - **Penetration Testing:** Regular penetration testing ### Operational Practices - **Security Updates:** Regular security updates - **Configuration Management:** Secure configuration management - **Incident Response:** Incident response procedures - **Security Training:** Security awareness training --- ## References - [Threat Model](SMOA-Threat-Model.md) - [Security Configuration Guide](SMOA-Security-Configuration-Guide.md) - [Incident Response Plan](SMOA-Incident-Response-Plan.md) - [Architecture Documentation](../architecture/ARCHITECTURE.md) --- **Document Owner:** Security Architect **Last Updated:** 2024-12-20 **Status:** Draft - In Progress **Classification:** Internal Use **Next Review:** 2024-12-27