If Ziggma’s servers were to be breached, your broker login credentials are safe for the simple reason that Ziggma never comes in touch with them. Moreover, all your data in Ziggma is encrypted on Amazon servers. In the very unlikely event that someone managed to hack into the Amazon cloud, the data would be useless without the key to decrypt it. A data breach when data is in transit is prevented by using HTTPS on all pages to ensure browsers always employ a secure connection.