# Technology Stack

#### Frontend Application

The web dashboard is a high-performance Single Page Application (SPA) designed for security and speed.

* **Framework:** React 18 with TypeScript.
* **State Management:** TanStack Query (for blockchain state) + React Context (for encrypted session state).
* **Build Tool:** Vite.
* **Styling:** Tailwind CSS (utility-first) with a custom design system.

#### Mobile Application

The bridge between physical hardware and digital networks.

* **Platform:** React Native (allows for consistent logic across iOS and Android).
* **Native Modules:** Custom native bridges for CoreNFC (iOS) and Android NFC hardware access.
* **Secure Enclave:** Utilizes hardware-backed keystores on supported devices for temporary operation.

#### Cryptography Libraries

We utilize the Noble Cryptography suite. These are high-security, audited, zero-dependency JavaScript implementations of cryptographic primitives.

* **Elliptic Curves:** @noble/curves (secp256k1).
* **Hashing:** @noble/hashes (SHA-256, HMAC, HKDF, Argon2).
* **Ciphers:** @noble/ciphers (AES-GCM).

#### Signaling Server

A lightweight, stateless server used solely for the initial WebRTC handshake.

* **Runtime:** Node.js.
* **Protocol:** WebSocket (wss\://).
* **Privacy:** The server only relays encrypted SDP (Session Description Protocol) packets. It cannot decrypt the handshake and stores no logs.


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