MIFARE Classic® Compatible 4K Direct Write UID

Description

The Generic MIFARE Classic® Compatible 4K Direct Write UID card is intended for authorised security assessments, RFID research and controlled training. Its UID can be rewritten without an unlock step, allowing security teams to test systems that use MIFARE Classic® compatible 4K cards and 4-byte identifiers. Use only with systems and credentials you are authorised to assess.

Key features

• MIFARE Classic® compatible 4K memory profile
• Rewritable 4-byte UID
• UID can be changed multiple times
• DirectWrite method
• Gen 2 chipset generation
• No unlock required for UID writing

Technical details

• Chipset: MIFARE Classic® compatible
• Memory: 4K
• UID: 4 bytes, modifiable multiple times
• Write method: DirectWrite
• UID write location: Block 0
• Generation: Gen 2

Compatibility and setup

The card is listed as compatible for reading, writing and configuration with Flipper Zero and Proxmark or iCopy-X. Android and iOS compatibility is listed with MTools recommended. LibNFC is supported for reading, writing and configuration, while ChameleonUltra configuration is supported with MTools. A compatible reader, writer or research device is required. Incorrect UID-related values may prevent detection, so test changes in a controlled environment and retain authorised source-card data where appropriate.

Buying in the UK and EU

RedKit Labs lists this generic card for UK and EU security professionals in GBP, EUR or USD, with VAT handled at checkout. UID-changing cards should be used only for authorised testing, and any access-control, privacy, fraud, export-control or local RFID compliance requirements should be reviewed before use.