MIFARE Classic® Compatible 1K tag - One Time Write UID Changeable - White PVC Disc
More and more access control systems (notably VIGIK® compatible systems in Europe) use detection routines to determine if a badge is Gen1 or Gen2 - and will refuse access to prevent cloned badges being used.
The solution is Gen2a MIFARE Classic® Compatible 1K UID One-Time-Write tags.
The UID of the tag can be written one time only. Once written, it cannot be changed - the tag is indistinguishable from an original tag.
The UID can be modified via Direct Write, making the tag compatible with almost any NFC-capable device (Flipper Zero, Android, LibNFC.
| Feature |
Information |
Notes |
| Chipset |
MIFARE Classic® Compatible |
UID is One Time Write
|
| Memory Size |
1K |
|
| UID Size |
4 Byte |
|
| UID Modifiable |
✔️ |
One time
|
| Chip Generation |
Gen 2a |
Chipset Generation Guide
|
|
| UID Type |
Unlock Required |
DirectWrite |
One Time Write |
Notes |
| UID Type |
|
✔️ |
✔️ |
|
|
| Compatibility |
LibNFC |
Proxmark |
Android |
Notes |
| UID Writing |
✔️ |
✔️ |
✔️ |
|
| Card Writing |
✔️ |
✔️ |
✔️ |
Non-Block0 writing supported by all devices |
| Card Reading |
✔️ |
✔️ |
✔️ |
Card reading supported by all devices |
IMPORTANT:
The UID of MIFARE Classic® Compatible 1K One Time Write UID tags is comprised of two parts: the UID itself, and the BCC. The BCC is a checksum value calculated from the UID. If the BCC is incorrect, tag will be rejected by the reader.
Most RFID tools, such as the Proxmark, LibNFC, MCT etc automatically calculate the BCC when the UID is modified. If you are modifying the UID by hand, it is vital that the BCC is correctly calculated.
Lab401 cannot provide support or refunds under any circumstances for cards that were 'bricked' due to incorrect UID/BCC configuration.
Hands on: See the card in action
Like all of the cards supplied by Lab401, the MIFARE Classic® Compatible 1K One Time Write UID tag is compatible and integrated into all of your favourite tools: Proxmark 3, libnfc, etc.
Using the cards is incredibly simple - check out the demonstration below.
