# Zentalk

<details>

<summary>Where can I use Zentalk?</summary>

Zentalk is available now as a web application at [zentalk.chat](https://www.zentalk.chat/). It runs as a Progressive Web App (PWA) in your browser and can be installed on any device — desktop, iOS, Android — without an app store. Native mobile apps for iOS and Android are in development.

</details>

<details>

<summary>How does Zentalk ensure privacy and security?</summary>

Zentalk uses multiple layers of security:

* **Signal Protocol** (X3DH + Double Ratchet) for end-to-end encryption of all messages
* **3-hop onion routing** (RSA-4096 per layer) so no single relay knows both sender and recipient
* **Zero-knowledge proofs** (Groth16 RLN) for anonymous authentication
* **Post-quantum cryptography** (Kyber-768 + Dilithium-3) for protection against quantum computers
* **Server-blind architecture** — nodes store and relay encrypted data they cannot decrypt

</details>

<details>

<summary>Why should I choose Zentalk over other messengers?</summary>

Zentalk is fully decentralized with no central server. Unlike Signal (centralized servers), Telegram (no default E2EE), or WhatsApp (Meta-owned, metadata collection), Zentalk distributes data across independent validator nodes that cannot decrypt your messages. No phone number is required — you can sign in with a Web3 wallet.

</details>

<details>

<summary>Do I need a phone number to use Zentalk?</summary>

No. Zentalk supports two authentication methods:

* **Web3 Wallet** (primary) — Sign in with MetaMask, WalletConnect, or any Web3 wallet. No phone number needed.
* **Phone-based** (alternative) — Optional SMS verification. Your phone number is deleted after verification; only a hash is stored.

</details>

<details>

<summary>Can Zentalk be used without an internet connection?</summary>

Yes. When you are within range (up to 6km) of a Zentanode device, you can communicate offline through the Zentamesh network. Messages are routed through the local mesh without requiring internet connectivity.

</details>

<details>

<summary>Is Zentalk free to use?</summary>

Yes. Zentalk is free to download and use. All core features — messaging, calls, groups, file sharing — are available at no cost.

</details>

<details>

<summary>What features does Zentalk offer?</summary>

Zentalk includes:

* Encrypted text messaging with reactions, replies, editing, and disappearing messages
* Voice and video calls (1-on-1 and group up to 6 participants)
* Encrypted groups with role-based access and broadcast channels
* Stories, polls, and location sharing
* File sharing (images, videos, documents, GIFs, stickers)
* Built-in image editor
* Multi-language support
* Dark and light themes

</details>

<details>

<summary>How can I connect my Zentanode with Zentalk?</summary>

Open Zentalk Web at [zentalk.chat](https://www.zentalk.chat/) and use the map explorer to find nearby nodes. You can connect to your own Zentanode or a friend's node directly through the app interface. Once connected, you can communicate offline within the node's range.

</details>

<details>

<summary>Does Zentalk support group chats?</summary>

Yes. Zentalk supports encrypted group chats with role-based access (Owner, Admin, Member), invite links, and automatic key rotation when members are removed. Group messages use Sealed Fanout — a privacy-preserving delivery method where relays never learn who is in the group.

</details>

<details>

<summary>Is Zentalk open source?</summary>

Yes. Both the client and server code are open source. Every line of code is auditable — trust is verified, not assumed.

</details>

<details>

<summary>Can I run a Zentalk validator node?</summary>

Yes. You can run a validator node by staking 5,000 CHAIN tokens. Requirements: 4 CPU cores, 8 GB RAM, 500 GB SSD, and a public IP address. Deploy with a single binary or Docker. Visit [explore.zentalk.chat](https://explore.zentalk.chat/) for the validator explorer.

</details>

<details>

<summary>What platforms is Zentalk available on?</summary>

* **Web Application (PWA)** — Available now at [zentalk.chat](https://www.zentalk.chat/)
* **macOS App** — Coming soon
* **iOS App** — Coming soon
* **Android App** — Coming soon

The PWA can be installed on any device directly from the browser.

</details>


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