qortal-ui/core/src/lockScreen.js

import CryptoJS from 'crypto-js'
                                    
export const encryptData = (data, salt) => CryptoJS.AES.encrypt(JSON.stringify(data), salt).toString()                             
export const decryptData = (ciphertext, salt) => {
    const bytes = CryptoJS.AES.decrypt(ciphertext, salt)
    try {
        return JSON.parse(bytes.toString(CryptoJS.enc.Utf8))
    } catch(err) {
        return null
    }
}