Trust Wallet Extension Security Architecture

Security Architecture Overview

// Encryption Implementation Example
class WalletSecurity {
  constructor() {
    this.encryptionKey = null;
    this.secureStorage = new SecureStorage();
  }

  async deriveKey(password, salt) {
    const encoder = new TextEncoder();
    const keyMaterial = await crypto.subtle.importKey(
      'raw', 
      encoder.encode(password),
      { name: 'PBKDF2' },
      false,
      ['deriveKey']
    );

    return await crypto.subtle.deriveKey({
      name: 'PBKDF2',
      salt: salt,
      iterations: 100000,
      hash: 'SHA-256'
    }, keyMaterial, {
      name: 'AES-GCM',
      length: 256
    }, false, ['encrypt', 'decrypt']);
  }

  async encryptSeedPhrase(seedPhrase, password) {
    const salt = crypto.getRandomValues(new Uint8Array(16));
    const iv = crypto.getRandomValues(new Uint8Array(12));
    const key = await this.deriveKey(password, salt);
    
    const encrypted = await crypto.subtle.encrypt({
      name: 'AES-GCM',
      iv: iv
    }, key, new TextEncoder().encode(seedPhrase));

    return {
      encrypted: new Uint8Array(encrypted),
      salt: salt,
      iv: iv
    };
  }
}