Certainly. Having requirements set in stone helps rewriting any code base. They probably get more time for optimization with the language handling a lot of the security and correctness issues as well as future changes.
Usually you can just get an agreement with the employer to leave sooner. Three months might be enough time to hire someone and have some limited handover, but better than no handover.
Having some kind of device key that will trigger a pop up similar to the SSH host verification on the first connection would be better. No spam every time I connect the phone to charge it and getting a dialog for MITM attempts.