Twitter turned off basic authentication for third-party applications, while enforcing OAuth for all apps. This is a long overdue move that should be applauded by anyone concerned about the security of their Twitter account. OAuth doesnt protect against local attacks stealing passwords straight from the users machines. Make sure you use a clean computer when you log-in to Twitter. Also, for more tips on staying safe, read my quick How to Avoid Getting Your Twitter Account Hacked guide on Threatpost.”]
Source: https://securelist.com/twitter-goes-oauth-only-yay-for-security/29740/