316 lines
9.5 KiB
Markdown
316 lines
9.5 KiB
Markdown
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# SMOA System 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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---
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## System Overview
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The Secure Mobile Operations Application (SMOA) is a hardened Android-based application designed for deployment on approved foldable mobile devices. SMOA enables identity presentation, secure internal routing, and mission communications in connected, disconnected, and degraded environments.
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### System Purpose
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SMOA provides secure mobile operations capabilities for government and military personnel, including:
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- Digital credential presentation
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- Secure communications
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- Orders management
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- Evidence chain of custody
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- Regulatory reporting
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- Domain-specific operations (law enforcement, military, judicial, intelligence)
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### System Context
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SMOA operates in a secure mobile environment with:
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- **Operating System:** Android (enterprise-hardened builds)
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- **Device Class:** Foldable smartphones with biometric hardware support
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- **Deployment Model:** Government-furnished or government-approved devices under MDM/UEM control
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- **Connectivity:** Online, offline, and degraded modes
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---
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## Architecture Principles
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### Security First
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- Multi-factor authentication required
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- Hardware-backed encryption
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- Zero-trust architecture principles
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- Defense in depth
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### Resilience
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- Offline operation capability
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- Degraded mode support
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- Data synchronization
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- Automatic recovery
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### Compliance
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- Standards-based implementation
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- Compliance by design
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- Audit trail throughout
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- Certification ready
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### Modularity
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- Modular architecture
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- Clear module boundaries
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- Well-defined interfaces
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- Reusable components
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---
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## High-Level Architecture
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### System Components
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```
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┌─────────────────────────────────────────────────────────────┐
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│ SMOA Application │
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├─────────────────────────────────────────────────────────────┤
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│ │
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│ ┌──────────────┐ ┌──────────────┐ ┌──────────────┐ │
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│ │ Core │ │ Core │ │ Core │ │
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│ │ Modules │ │ Modules │ │ Modules │ │
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│ │ (8) │ │ (8) │ │ (8) │ │
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│ └──────────────┘ └──────────────┘ └──────────────┘ │
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│ │
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│ ┌──────────────┐ ┌──────────────┐ ┌──────────────┐ │
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│ │ Feature │ │ Feature │ │ Feature │ │
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│ │ Modules │ │ Modules │ │ Modules │ │
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│ │ (13) │ │ (13) │ │ (13) │ │
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│ └──────────────┘ └──────────────┘ └──────────────┘ │
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│ │
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│ ┌──────────────────────────────────────────────────────┐ │
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│ │ Common Infrastructure │ │
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│ │ - Authentication - Security - Database │ │
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│ │ - Networking - Storage - Logging │ │
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│ └──────────────────────────────────────────────────────┘ │
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└─────────────────────────────────────────────────────────────┘
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```
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### Core Modules (8)
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1. **core:auth** - Authentication framework
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2. **core:security** - Security infrastructure
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3. **core:common** - Common utilities
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4. **core:barcode** - PDF417 barcode generation
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5. **core:as4** - AS4 gateway messaging
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6. **core:eidas** - eIDAS compliance
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7. **core:signing** - Digital signatures & seals
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8. **core:certificates** - Certificate management
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### Feature Modules (13)
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1. **modules:credentials** - Issued credentials
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2. **modules:directory** - Internal directory
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3. **modules:communications** - Unit communications
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4. **modules:meetings** - Secure meetings
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5. **modules:browser** - Controlled browser
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6. **modules:orders** - Orders management
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7. **modules:evidence** - Evidence chain of custody
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8. **modules:reports** - Report generation
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9. **modules:atf** - ATF form support
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10. **modules:ncic** - NCIC/III integration
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11. **modules:military** - Military operations
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12. **modules:judicial** - Judicial operations
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13. **modules:intelligence** - Intelligence operations
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---
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## Component Architecture
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### Authentication Component
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- Multi-factor authentication (PIN + Fingerprint + Facial Recognition)
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- Session management
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- Re-authentication triggers
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- Hardware-backed key storage
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### Security Component
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- Encryption (at rest and in transit)
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- Key management
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- Certificate management
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- Audit logging
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- Policy enforcement
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### Data Storage Component
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- Room database (local SQLite)
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- Encrypted storage
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- Offline data caching
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- Data synchronization
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### Network Component
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- Secure communication (TLS)
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- VPN support
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- Offline mode detection
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- Degraded mode handling
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---
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## Module Architecture
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### Module Structure
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Each module follows a consistent structure:
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- **Domain Layer:** Business logic and data models
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- **Data Layer:** Database and repositories
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- **Presentation Layer:** UI components (Jetpack Compose)
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- **Service Layer:** Business services
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### Module Dependencies
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- Core modules have no dependencies on feature modules
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- Feature modules depend on core modules
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- Clear dependency hierarchy
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- Minimal inter-module dependencies
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---
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## Data Architecture
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### Data Model
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- **Room Database:** Primary local storage
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- **Encrypted Storage:** Sensitive data encryption
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- **Offline Cache:** Time-bounded offline data
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- **Synchronization:** Data sync on connectivity
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### Data Flow
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1. User input → Domain layer
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2. Domain layer → Data layer (persistence)
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3. Data layer → Domain layer (retrieval)
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4. Domain layer → Presentation layer (display)
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### Data Protection
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- Encryption at rest (hardware-backed)
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- Encryption in transit (TLS)
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- Access control (RBAC)
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- Audit logging
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---
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## Integration Architecture
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### External System Integrations
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- **AS4 Gateway:** Inter-agency messaging
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- **NCIC/III:** Law enforcement databases
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- **ATF eTrace:** Firearms tracing
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- **QTSP:** Qualified Trust Service Providers
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- **Timestamping Authority:** Qualified timestamps
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### Integration Patterns
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- RESTful APIs
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- AS4 messaging
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- Secure file transfer
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- Certificate-based authentication
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---
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## Deployment Architecture
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### Deployment Model
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- **Device:** Government-furnished foldable Android devices
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- **MDM/UEM:** Mobile device management
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- **Backend Services:** Enterprise backend (if applicable)
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- **Network:** Secure government networks
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### Infrastructure Requirements
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- Android 7.0+ (API 24+)
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- Biometric hardware support
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- Hardware-backed key storage
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- Network connectivity (with offline support)
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---
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## Technology Stack
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### Platform
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- **Language:** Kotlin
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- **Platform:** Android
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- **Minimum SDK:** 24 (Android 7.0)
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- **Target SDK:** 34 (Android 14)
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### Core Libraries
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- **UI:** Jetpack Compose
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- **Database:** Room
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- **Networking:** Retrofit, OkHttp
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- **Dependency Injection:** Hilt
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- **Security:** Android Keystore, BouncyCastle
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- **Barcode:** ZXing
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- **PDF:** PDFBox or iText
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### Development Tools
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- **IDE:** Android Studio
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- **Build System:** Gradle
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- **Version Control:** Git
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- **CI/CD:** (To be determined)
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---
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## Security Architecture
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See [Security Architecture Document](SECURITY_ARCHITECTURE.md) for detailed security architecture.
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### Key Security Features
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- Multi-factor authentication
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- Hardware-backed encryption
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- Secure key storage
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- Encrypted communication
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- Audit logging
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- Policy enforcement
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---
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## Performance Considerations
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### Optimization Strategies
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- Lazy loading
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- Caching
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- Background processing
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- Efficient database queries
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- Image optimization
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### Performance Targets
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- Application startup: < 3 seconds
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- Screen transitions: < 300ms
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- API response: < 2 seconds
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- Database queries: < 100ms
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---
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## Scalability
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### Current Scope
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- Single device deployment
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- Local data storage
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- Offline-first architecture
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### Future Considerations
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- Multi-device synchronization
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- Cloud backend integration
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- Enterprise deployment
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---
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## Diagrams
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### System Architecture Diagram
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[To be added: PlantUML or image]
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### Component Architecture Diagram
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[To be added: PlantUML or image]
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### Module Dependency Diagram
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[To be added: PlantUML or image]
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### Data Flow Diagram
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[To be added: PlantUML or image]
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---
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## References
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- [Specification](../SPECIFICATION.md)
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- [Security Architecture](SECURITY_ARCHITECTURE.md)
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- [Implementation Status](../IMPLEMENTATION_STATUS.md)
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- [Compliance Matrix](../COMPLIANCE_MATRIX.md)
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---
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**Document Owner:** Technical Lead
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**Last Updated:** 2024-12-20
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**Status:** Draft - In Progress
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**Next Review:** 2024-12-27
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