How the one-time password gate works, and why it holds up.
2 of 6Next: Alchemer setupOne idea holds the whole thing up: every password is tied to one unique human and works exactly once.
1
Each verified respondent receives a one-time passcode, created for their face alone and dropped onto their link. It fills itself in at your study’s gate.
One-time passcode
vyp_k2•••••••4qt
Filled in from their link. Used once, then dead.
2
Bots and returning humans get locked out. A duplicate face never earns a second passcode, and a spent passcode is dead forever.
Into the study
Blocked
Same face, second try
3
You only pay for real, first-time respondents. Blocked traffic never enters your data and never gets paid.
Each password is a claim ticket. We only hand one to a person who just proved, on camera, that they are live and unique. Your study enforces the ticket with Alchemer’s own Login/Password action, set to individual one-time passwords that deactivate after use. Alchemer’s feature, Alchemer’s wording.So every cheap trick fails: a shared link carries a spent password, a guessed password does not exist, a bot never earns one, and the same face can never get a second one for the same study, on any device.One honest limit: the check proves who they are, not how carefully they answer. Keep your speeder and attention checks.
No photo is shared with you or with Alchemer, only a yes or no. Your study receives a verdict and a password, never a face, a name, or personal information.
