We’re 3 people sharing a common space, and we installed cameras. Our camera system only allows 1 admin (email + password, no 2FA). We do NOT want anybody accessing the recordings unless someone reports something being stolen.

We want to create an admin password so that only each of us will know the fire of it. Person 1 will have the 4 first characters, person 2 the next 4, and person 3 the last four characters. The email will be a gaggle email that will send all emails to us, also secured by this password. Thus preventing a stealth “forgot password” method.

There is an issue with that, however. Someone who does not want anyone to access the systems anymore can just write the wrong parts of his characters and make the login fail. Nobody can know who’s faking it and thus responsibility stays unknown.

Does anybody know a web-service, an app, or any way to prevent this?- example, a web-service where, when creating the password, every-body enters their parts. The systems remembers it but no own has access to it. To verify, each person enters their parts accordingly and if wrong, the system can at least says who’s faking it.

Or any other way?

Thank you