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Morpheus

Contributor

Registered: 2019-02-22

Posts: 2

Comelit vigik with anti copy function

Hello,

First sorry for my bad english, I'm french !

I'm working on comelit vigik with anti copy function like this: Comelit vigik

These badges are mifare 1K with default keys and implement an anti copy function which apparently works with a counter.
Each scan, the badge and the reader will increment a counter. The reader check if his value of the counter is the same as the badge scanned.

However, if you copy the badge and scan it, if the reader has registered a value different as the copied badge, it blacklist the UID so it makes the copy and the original badges non-functionnal.

Apparently, there is the possibility to unlock the badge without modifying the reader memory. Do you have any hint about how to do this? And do you have other information about this kind of badge?

Thanks

loupetre

Contributor

Registered: 2019-01-21

Posts: 29

Re: Comelit vigik with anti copy function

Hello,

It is very very strange ...
Do you have access to a badge/reader that implements this anticopy system ?
Maybe the reader checks that the counter is "at least" of value X, or accepts some kind of divergence. In that case, the badge would autoincrement the counter by itself. Well, this is quite weird.
NB : sorry for my english too, I'm french as well