Translated using Google Translate:
We have VisorTech Electronic door lock cylinder
There are 10 doors with this lock. Opened with NFC tag. Flipper read 8 of them without problems.
But 2 locks, although they do not have visual differences, apparently have a different version, and have a different level of protection.
Flipper was unable to correctly read their labels.
Here is what I get when I read it:
MIFARE Classic 4K
ISO 14443-3 (Type A)
UID: 89 08 FC 25
Keys Found: 80/80
Sectors Read: 32/40
I read this label with an Android application: MIFARE Classic Tool and this is what I got:
Then, nevertheless, I opened the file that Flipper saves … Flipper could not read the last 8 sectors, those that differ in size.
Here’s what he saved:
Probably the encoding of the last sectors was not read. Don’t know.
I tried to edit the file manually, according to the data from the MIFARE Classic Tool application.
Now Flipper correctly sees sectors. The file is being read but the lock is not opening.
I decided to check whether the label and the Flipper signal are read equally by the smartphone. They are read differently.
How the label is read, I already showed above, the data set is visible.
The Flipper signal just reads “mark detected”… here’s the screenshot:
Maybe someone has some ideas? How to make it work…