Pocket machine for making a magnetic key - is it real?

Question

Do it yourself

otvet.mail.ru/question/170370984 - here is the background of the question with clarifications:
I have 2 such passes:

- they need to be stuffed somehow into 1. Is there a hand tool that can do this on the spot? They are handed over when they leave. Essence. Somewhere I lost my personal pass from 2 checkpoints - so I have to strain the guards and secretaries to get as many as two guest passes. And when he was his - he was 1 from both checkpoints. Interested in where and how much you can buy such a manual device that copies such things?
> Is it a problem to get a new one?
Added 1 hour ago
Getting a new one is a problem. . this is a hassle for at least 4 more people in the process of receiving, filling out unnecessary paperwork, and wasting another two weeks of time for which you have to pull the secretaries and the checkpoint every time (2 times at the entrance and exit from the organization) - a bunch of unnecessary gestures. If there is such a device and it is relatively inexpensive, you can get rid of hemorrhoids in yourself and in people.
> We have a programmable chip inside such passes (only with a photo) in our bank. Therefore, such a pass opens ONLY those doors where access is allowed. Is yours chipped?
Added 44 minutes ago
Mine is not chipped, there may not be any photo - everyone knows me by sight and so, because I have been working there for 2 years.

Answer 1

Pocket machine for making a magnetic key

I don't understand why you call this (RFID) card a magnetic key. I highly doubt that you have dealt with magnetic keys at all.
I don’t know how to combine two cards into one using household devices, but you can clone a card using something like this device (RFID cloner). But this is if your card works at 125 kHz. Well, you should be prepared for possible nuances.

Answer 2

The nuance of the next card is with ID (EM-Marine 125kHz) or ID + several memory cells encrypted with a password (Mifare 13.56). If the system is simple or the installers are not concerned about security, then EM-Marine is used. Such a card can be easily copied to a blank, even of a different size, such as an rfid key fob . True, it is necessary to take into account the EM4100 format for example. If the card is Mifare, then nothing will come out of the crypto algorithm. It would also not be bad to see the locks themselves, perhaps it is easier to register a card in them (a jumper is placed directly on the lock in the recording mode, then any free card or key fob is brought).
By the way, judging by the picture, you still have encrypted Mifare on it there are fewer numbers than on EM-marine cards