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