Guardyn Shield

Guardyn

The Privacy Rebellion Starts Now

"Your conversations are not a product. Your metadata is not for sale. Your privacy is not negotiable."

Post-quantum secure communication platform with ML-KEM (Kyber) + X3DH hybrid encryption. Built with Double Ratchet and OpenMLS (AES-256-GCM) protocols.

Native apps: Flutter for iOS/Android, Tauri for Windows/macOS/Linux. Unified Rust crypto core — single source of truth across all platforms.

🚀 Join Beta Testing View on GitHub
ML-KEM
Post-Quantum Crypto
AES-256
Military-Grade E2EE
5
Native Platforms
Rust
Unified Crypto Core
<100ms
Message Latency
Zero
Metadata Collection

See Guardyn in Action

Watch how Guardyn protects your communications with military-grade encryption

Native Apps. Every Platform.

Flutter for iOS & Android. Tauri for Windows, macOS & Linux.
Same unified Rust crypto core — AES-256-GCM + ML-KEM post-quantum encryption everywhere.

Guardyn Apps - Cross-platform secure messaging on Android, iOS, Linux, macOS, and Windows
Android iOS Windows Linux macOS

Built for Everyone

From activists to enterprises, Guardyn provides the privacy layer for the modern world.

🕊️

Civil Society

  • 🖊️ Journalists protecting sources
  • 🛡️ Human Rights Defenders
  • 🤝 NGOs in conflict zones
  • 🏳️‍🌈 LGBTQ+ Activists
  • 🗣️ Whistleblowers & Dissidents
🏢

For Business

  • 🏥 GDPR/HIPAA Healthcare Orgs
  • ⚖️ Legal Client Privilege
  • 💼 Executive Communications
  • 🧪 IP & R&D Protection
  • 💰 Secure Financial Operations
🏛️

For Government

  • 👔 Diplomatic Communications
  • 🕵️ Intelligence Sharing
  • 🗳️ Election Infrastructure
  • 👮 Law Enforcement
  • 🏙️ Smart City Security
🎖️

For Military

  • 📡 Tactical Operations
  • 🗺️ C2 (Command & Control)
  • 🚛 Secure Logistics Chain
  • ⚓ Naval Communications
  • 🪖 Field Unit Coordination

Why Choose Guardyn?

Military-grade cryptography meets enterprise-grade infrastructure. Built by security engineers for the privacy-conscious era.

🔐

Post-Quantum Cryptography

ML-KEM (Kyber) + X25519 hybrid key exchange. Double Ratchet with AES-256-GCM. OpenMLS for groups. PADMÉ padding for traffic analysis protection. Future-proof against quantum computers.

🛡️

Audit-Ready Transparency

Reproducible builds with Nix, SBOM generation, artifact signing with Cosign, TLA+ formal proofs, and independent security audits (Cure53, Symbolic Software).

🏗️

Enterprise Infrastructure

Rust backend, TiKV for distributed transactions, ScyllaDB for high-throughput storage, Redpanda (Kafka-compatible) for event streaming. Docker Compose dev, Kubernetes prod.

⚡

High Performance

Message delivery <500ms, call setup <2s, voice latency <150ms, 1080p video at 30fps, 1000+ messages/sec throughput.

📱

Platform-Optimized Clients

Flutter for iOS & Android — touch-first, native feel. Tauri + SolidJS for desktop — native menus, system tray, screen sharing. Unified guardyn-crypto Rust core via FFI.

📞

E2EE Voice & Video

WebRTC with SFrame encryption, Opus codec for audio, VP9/AV1 for video. First platform with E2EE live broadcasting (<2s latency).

👥

OpenMLS Group Chat

IETF-standard Messaging Layer Security for groups up to 1000 members. Cryptographic guarantees for group confidentiality and integrity.

🔒

Hardware-Backed Keys

Secure Enclave (iOS/macOS), AndroidKeyStore (Android), TPM 2.0 (Windows/Linux). Identity keys protected by secure hardware — never extractable.

🧩

Unified Crypto Core

Single guardyn-crypto Rust library for all platforms. One security audit, zero implementation drift between iOS/Android/Desktop.

🌐

Self-Hosted Option

Full data sovereignty with Community Edition (Apache-2.0). Docker Compose for quick start, Kubernetes for production scale.

Technology Stack

Modern, battle-tested technologies for maximum security and performance
💡 Click on any technology to learn more

🦀 Backend Services (Rust)

Rust (Memory-Safe) gRPC APIs Auth Service Messaging Service Media Service Presence Service Notification Service

💾 Data Layer

TiKV (Distributed Transactions) ScyllaDB (High-Throughput) Redpanda (Kafka-Compatible) Redis (Caching) MinIO (Object Storage)

🔐 Cryptography

guardyn-crypto (Unified Core) PQXDH (X3DH + ML-KEM Hybrid) ML-KEM-768 (Post-Quantum) Double Ratchet (AES-256) OpenMLS (AES-256-GCM) X25519 / Ed25519 PADMÉ Padding SFrame (Media E2EE)

📱 Client Applications

Flutter 3.x (iOS/Android) Tauri 2.x (Desktop) SolidJS (Desktop UI) flutter_rust_bridge WebRTC + LiveKit BLoC Pattern

☸️ Infrastructure

Docker Compose (Dev) Kubernetes (Prod) Kustomize Helm Charts Cilium CNI SOPS + Age (Secrets)

📊 Observability

Prometheus Grafana Loki (Logging) Tempo (Tracing) OpenTelemetry

🔧 DevOps & Security

Nix Flakes (Reproducible Builds) GitHub Actions Cosign (Artifact Signing) Syft (SBOM) cargo-audit TLA+ Specifications ProVerif (Crypto Proofs)

Production-Grade Architecture

Kubernetes-native design with battle-tested components

🎯

Microservices Architecture

5 core services (Auth, Messaging, Media, Presence, Notifications) deployed across namespaces: platform, data, messaging, observability, apps.

🔄

Kafka-Compatible Streaming

Redpanda topics (MESSAGES, PRESENCE, NOTIFICATIONS, MEDIA) with Schema Registry, tiered storage, and Kafka Connect ecosystem.

💪

Triple Redundancy

3-node clusters for TiKV, ScyllaDB, and NATS. Fault-tolerant with automatic failover and recovery.

📦

Kustomize Overlays

Environment-specific configs (local, prod) with base manifests. GitOps-ready for declarative infrastructure management.

🔑

Secrets Management

Age encryption with SOPS for all sensitive configs. Zero plaintext secrets in git, vault-backed for production.

🚀

CI/CD Pipeline

Automated builds with Nix, security scans (cargo-audit, clippy), integration tests on k3d, signed releases with Cosign.

Join the Privacy Rebellion

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Project Status

🎉 v1.0.1 Production Ready — January 2026

v1.0.1

Current Release

57

Issues Resolved

228h

Development Time

8/8

E2E Tests Passing

Q1 2026

Public Beta

Apache 2.0

Open Source