Epitoken

10 sec validate his token Epitech

Take a photo of your token and it will automatically be validated on the Intra Epitech.

It's simple and effective free.

Regarding identifiers of course I will not back I have no interest in that. They are stored in your phone once they return once.

If you are afraid that it validates you 3 times a false token aware that there is a server-side check that prevents one attempt after three retry on Epitoken. So even if the token detection bug by bad luck, no risk to you.