I encountered a situation in the past which was very uncomfortable for me and I am not sure how to handle this/act if I get into something similar in the future. For my work it was necessary to confirm crucial actions with a transaction authentication number (TAN) procedure, without this confirmation I couldn't do my job.
From day to day our IT-department changed the TAN procedure to a mobile authenticator. My manager wanted me (and my other colleagues as well) to use our personal mobile phones to install the required app and use them for the TAN procedure. I tried to refuse this by explaining him it's my personal device and risks of possible security issues. But he insisted on using the new procedure, it would be mandatory after the transition phase and he wouldn't be able to provide us company devices so fast.
Due to the facts that I relied heavily on these TANs to do my daily work, I didn't receive much support from my other colleagues and I was a very small fish in the company I followed the directive.
So my questions are:
Can my manager make me use my personal devices (mobil phone, notebook etc.) for work, when there is allegedly no other way to do my work (even it is just for a short amount of time)?
What can I do in situations like this, when resisting/refusing could cost me my job?
Note: I was accountable for the aftermath of doing or not doing my work and due to probationary period I've could been cut off easily.