Architecture

Deep dive into Solidarity’s technical architecture, privacy features, and implementation details.

Overview

Solidarity is built with three core principles:

1. Privacy First - Your data never leaves your device
2. Offline First - Works without internet connection
3. User Control - You decide what to share and with whom

Architecture Sections

Privacy & Security

Learn how Solidarity protects your data with encryption, local storage, and granular privacy controls.

Key Topics:

• AES-GCM 256-bit encryption
• iOS Keychain integration
• Three-level privacy system
• Zero telemetry design

Peer-to-Peer Networking

Understand how Solidarity enables offline sharing through direct device connections.

Key Topics:

• MultipeerConnectivity framework
• Proximity-based device discovery
• QR code fallback
• Apple Wallet integration

Pass Signing Service

Serverless credential issuance architecture for Apple Wallet integration.

Key Topics:

• Cloudflare Workers backend
• Privacy-preserving design
• PKCS#7 signature generation
• Zero user data storage

Zero-Knowledge Proofs

Explore how Solidarity uses ZK proofs for anonymous group verification.

Key Topics:

• Semaphore protocol
• Mopro implementation
• Anonymous credentials
• Group membership verification

Technology Stack

Complete technical stack, frameworks, and implementation details.

Key Topics:

• SwiftUI + MVVM architecture
• Native iOS frameworks
• Data flow diagrams
• Performance considerations

Design Philosophy

Local-First

All data stored and processed on your device. No servers, no cloud, no tracking.

User Control

Every share requires explicit permission. You choose the privacy level each time.

Standards-Based

Built on proven protocols and Apple’s native frameworks for reliability and security.

Quick Reference

Choose a section above to dive deeper into Solidarity’s architecture.