The University of SydneyPage 7Recap of Week 6–What are the alternative methods for SMS authentication that involves smartphones?–1. End-to-end encrypted SMS.–2. Communication over third party apps.–3. Telco APIs.–4. Third Party Authentication Apps.–Authy: https://authy.comSAASPASS–https://saaspass.com–Duo Security: https://duo.com–Google Authenticator–Otka