How can I implement user authentication in a React Native app using crypto?

How can I implement user authentication in a React Native app using crypto?

You can use libraries like 'react-native-crypto' and 'react-native-keychain' to handle user authentication securely.

What are the steps to set up 'react-native-keychain'?

First, install the library using npm or yarn, then import it in your component and use its methods to store and retrieve credentials.

Can you show me a code example?

Sure! Here's a simple example:

import * as Keychain from 'react-native-keychain';

async function saveCredentials(username, password) {
  await Keychain.setGenericPassword(username, password);
}

async function loadCredentials() {
  const credentials = await Keychain.getGenericPassword();
  if (credentials) {
    console.log('Credentials successfully loaded for user ' + credentials.username);
  } else {
    console.log('No credentials stored');
  }
}

What about using JWT for authentication?

Using JWT is a great approach! You can generate a token on your server and store it securely on the client side using 'react-native-keychain'.