It is imperative to distinguish the tool’s capability from its legitimate application. MCT 2.3.1 includes an explicit ethical disclaimer, warning against accessing systems without permission. In legitimate contexts, it serves as an invaluable Red Team utility for physical penetration testers to audit facility access control, student dormitories, or hotel key systems. Additionally, in the archival sciences, MCT is used to recover data from corrupted or aged MIFARE cards where facility management has lost administrative keys. However, the ease of cloning static UID (Unique Identifier) cards—such as Chinese "CUID" or "MIFARE 1K" fobs—has led to widespread low-security bypasses, notably in gated communities and college laundry systems.
The final block of every sector (Block 3 in Sector 0, Block 7 in Sector 1, etc.) is the "Sector Trailer." This critical block stores: Key A (6 bytes)
Here is the organized content for . This content is structured for a release announcement, a download page, or a documentation README. mifare classic tool 2.3.1
To safely use MCT 2.3.1, you must understand the storage layout of a standard 1K MIFARE Classic tag. Description Distinct memory zones isolated from one another. Blocks 4 per sector Each block contains exactly 16 bytes of data. Sector Trailer Block 3 of each sector Stores Key A, Access Bits, and Key B. UID Block Sector 0, Block 0 Contains the manufacturer data and unique ID. Step-by-Step Guide: Reading and Dumping a Tag
Follow this workflow to safely back up a MIFARE Classic card using version 2.3.1. It is imperative to distinguish the tool’s capability
APK (available on F-Droid or GitHub ). A MIFARE Classic tag (e.g., key fob, access card). 2. Core Functions Guide A. Read Tag (Basic) Open the app and select Read Tag .
Once you have a dump file, you can write it to another compatible card: Additionally, in the archival sciences, MCT is used
The Mifare Classic 1K tag contains 16 sectors, each divided into 4 blocks. The final block of each sector is the "Sector Trailer," which stores two keys (Key A and Key B) and Access Conditions (ACLs). The security of the card relies on the proprietary Crypto1 stream cipher.
Block 0 (the first block of Sector 0) contains the manufacturer data and the hardware UID. On commercial MIFARE Classic cards, Block 0 is permanently read-only.
Cloning access cards or manipulating transit balances is illegal in most jurisdictions. MCT should be viewed as an educational resource for understanding RFID security. Getting Started with Version 2.3.1
The development of Mifare Classic Tool 2.3.1 is ongoing, with new features and updates being added regularly. Some of the planned features include: