tripcode
nounUK /ˈtrɪp.kəʊd/
US /ˈtrɪp.koʊd/
A tripcode is a short secret code that shows who you are when you post on some websites.
He added a tripcode to his post so people would know it was really him.
OTHER MEANINGS
2. A code used to verify a traveler's booking or trip details.
Please show your tripcode at the hotel front desk.
3. A short label attached to a message to prove the sender's identity.
The moderator checked the tripcode before trusting the message.
4. A unique string that replaces a name on anonymous message boards.
Without a tripcode, every poster looked the same.