Registration/Login is enforced for the following purposes:

  • Tracking your challenge solving progress
  • Differentiating bots vs actual humans
  • Assessing the effectiveness of awareness campaigns
Your plain-text email and name are never stored. Your record is completely anonymized in the database as shown in the following screenshot:

If your Twitter registered email is Google mail, you can have same account information when you log in using either option. If you changed your primary email, your record here would be treated as a new user. Please check privacy policy for details.