Question 1

How do I install Voidly Messenger on iPhone?

Accepted Answer

Open msg.voidly.ai in Safari, tap the Share button (square with arrow), then tap "Add to Home Screen". The app will appear on your Home Screen like a native app — full screen, no browser chrome, with its own icon.

Question 2

Why not use the App Store?

Accepted Answer

The App Store requires Apple review, which can delay updates and restrict features. As a Progressive Web App (PWA), Voidly Messenger updates instantly, works offline, and gives you the same experience without gatekeepers. iOS 16.4+ supports push notifications, standalone display, and all the Web APIs we need.

Question 3

Is it really end-to-end encrypted?

Accepted Answer

Yes. Every message is encrypted on your device before it leaves. The relay server only sees ciphertext it cannot read. We use Double Ratchet (same algorithm as Signal) for forward secrecy — if a key is compromised, past and future messages stay encrypted. On top of that, ML-KEM-768 post-quantum protection guards against future quantum computers.

Question 4

What is post-quantum encryption?

Accepted Answer

ML-KEM-768 (NIST FIPS 203) is a new encryption standard designed to resist quantum computer attacks. Voidly Messenger uses a hybrid approach: classical X25519 + post-quantum ML-KEM-768. Both must be broken simultaneously to compromise a session. This protects against "harvest now, decrypt later" attacks where someone records your encrypted traffic today hoping to crack it with a future quantum computer.

Question 5

Can the Voidly server read my messages?

Accepted Answer

No. Private keys are generated and stored locally on your device in IndexedDB. The relay is a blind courier — it routes encrypted blobs it cannot decrypt. Even if the relay server is fully compromised, your messages remain private thanks to client-side encryption.

Question 6

Does it work on Android and desktop?

Accepted Answer

Yes. While designed primarily for iPhone (where App Store alternatives are limited), Voidly Messenger works on any modern browser. On Android, Chrome will prompt you to install it as a PWA. On desktop, it works in any browser as a regular web app.

Question 7

How do I add contacts?

Accepted Answer

Each user gets a unique did:voidly: identity derived from their cryptographic keys. Share your DID via QR code (scan in person) or copy-paste it. There is no phone number or email required — your identity is purely cryptographic.

Question 8

What happens if I lose my phone?

Accepted Answer

Your encryption keys are stored locally. Before losing access, export your credentials from Settings — this gives you a JSON backup you can import on a new device. Without this backup, you would need to create a new identity. We recommend exporting your credentials as soon as you set up.

Encryption SDK	`@voidly/agent-sdk v3.2.7 (MIT)`
Key Exchange	`X3DH (X25519) + ML-KEM-768 (NIST FIPS 203)`
Message Encryption	`Double Ratchet → XSalsa20-Poly1305 per message`
Signatures	`Ed25519 (tweetnacl)`
Channel Encryption	`NaCl secretbox (XSalsa20-Poly1305)`
Identity	`did:voidly:{base58} — self-certifying, no central authority`
Storage	`IndexedDB (encrypted ratchet state, contacts, messages)`
Transport	`SSE primary, long-poll fallback, webhook push`
Relay	`api.voidly.ai (Cloudflare Worker + D1)`
Offline	`Service Worker shell + IndexedDB message cache`

Voidly Messenger

Why Voidly Messenger?

Security Features

Double Ratchet E2E

Post-Quantum Protection

Encrypted Group Channels

Sealed Sender

No App Store Required

QR Identity Exchange

Encryption Comparison

How It Works

Create Your Identity

Exchange QR Codes

Send Encrypted Messages

Join Encrypted Channels

Install on iPhone

Open in Safari

Tap Share

Add to Home Screen

Launch

Technical Details

Frequently Asked Questions

Ready to message privately?

Feature	Signal	Telegram	WhatsApp
E2E Encryption		~
Forward Secrecy		—
Post-Quantum	~	—	—
No Phone Number	—	—	—
Sealed Sender		—	—
No App Store	—	—	—
Open Protocol		~	—