Another newby question dual simultaneous readings?

[Pilgrimsmaster]

@heliloo

I don’t know that I have enough of a level on the forum to reply with all the quotes imbedded

just highlight the text and a quote button should show up, like this

@heliloo

6.4cm

That I understand

@heliloo

The vehicle is a bus I’m making into an RV.

AH, yes, I remember now

Questions on setting up a magnetic lock entry for a door

Hello, First of all I basically have no clue about RFID systems, but have been frantically trying to learn. I’m making a school bus into an RV. I want to make a “shaved” door, with no handle outside. I want to have an RFID entry into the bus, with the reader inside next to the skin of the bus. So you would swipe your rfid object from the outside of the bus, through the skin of the bus, and have the door pop open. I’m looking at the xEM Access Controller V2, and have a couple of questions…

@heliloo

I’ll try to upload a picture. It works well.

You are at MEMBER level, so sharing images should be no worries
EDIT ( I see them attached now )

@heliloo

Assuming the new modules I’ve gotten have one built in…

Link? I can have a look for you if you are unsure

@heliloo

Power shouldn’t be an issue. I’ll have 4200 watts of solar, and huge batteries, and likely a generator backup, so the power should be constant.

Yeah, no worries there

@heliloo

The reason I’m posing the question is that naysayers have always told me the RFID is not very secure and that the door would be easily opened by someone who knew about RFID.

Don’t listen to idiots. especially idiots that can’t back up their statements or provide links.

rebut them with this
“A mechanical lock can be easily opened by somebody who knows about locks”

Both are slightly true, but also neither accurate nor realistic…

@heliloo

(for example there’s supposedly universal “keys” that just open everything?)

Here’s one

But as far as RFID skeleton key, It does not exist, so ignore those idiots.
Just like physical keys don’t have a single skeleton key.

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Now, let’s take ME as an example, I would say my skills in physical and RFID locks are on par, and there are other people with far better skills in both

The LF system you have, would be easy to clone BUT people would need:
The Need and Want to access your bus
Know which RFID system you are using
Know where you are keeping your key/fob/implant
The right tool to clone it
Need to get personally “close” ~10mm ( there are some tools that can extend that range ~1m ) and implant, they would need to touch you with their tool .

So you are correct, If I was inclined, I am confident I could get this from you with the tools that I have, but I would have to know who you are, where you are, and get very close to you

If however, you went down the mechanical lock route, I would have 2 attack vectors ( and the way I would choose ), I would simply wait until you moved away from your bus, and I am equally confident I could get into your bus, I would just wait until you moved away from it, I wouldn’t need to get close to you, OR I would wait to get an opportunity to get a photo of your key and make myself one. ( photo of keys when put on the table at a cafe etc. )

How to keep me out
RFID
Install a DESFire access system, utilising security features
or
Don’t tell me you have one
or
use an RFID blocking wallet/ or have an implant

Mechanical Lock
Install a Bowley Lock

I would also say, the people that have this same knowledge are probably not the people that would use it against you.

The person that would, are more likely to be like this

@heliloo

Obviously, I’m not well versed in it…

The people telling you about universal “keys” have far less knowledge than you do

@heliloo

I can order a 13.56 module to play around with.

Can’t hurt, they are cheap, so nothing lost

@heliloo

I could even have two separate power supplies so that if one of the systems fail the other is intact.

If you run them in parallel. that would work, but I don’t think it is practical

@heliloo

Or maybe just stick with the one reader, haha.

Ha, well, now you have reminded me it’s the bus, with “unlimited” power. To me your dual frequency option is now a more viable option, not saying you SHOULD, but just now it is more POSSIBLE

@heliloo

Still pondering, thanks.

Me too…
What you have now is working, and also installing an HF option is trivial and you will achieve the 2FA that may make you feel more secure

I would just say, you probably need to asses your threat model