You secure sensitive informations and encrypt? But at your bounty you published eMail adresses from participants and encrypted only three or four letters without asking them. How does that suite to your project? Or did you change that procedure already?
Previous way how "emails" were shown on the leaderboard they were obfuscated enough not to copy paste them and use them for spam purposes.
Nonetheless - we took suggestions and left only 3 letters from the whole email, just so the person can find him on the leaderboard too.
Regarding the encryption and sensitive information - I would like to suggest you referring to the white paper where exact procedure is described, just so we do not copy-paste whole sections from the white paper in this thread.