如果你手中有一张全新的“CUID”空白卡（支持写UID块），可以按照以下步骤操作：
: It can read data from MIFARE Classic 1k, 2k, or 4k tags and write data to them, provided the user has the correct authentication keys (Key A and Key B) Key Management
: Uninstalling the app permanently deletes all saved dump and key files. Getting Started with 2.3.1
. Many modern phones (like some Samsung or Google Pixel models) use different controllers that physically cannot communicate with MIFARE Classic tags. Raw Data Focus mifare classic tool 2.3.1
is a specialized Android application designed for interacting with MIFARE Classic RFID tags , such as access control cards, transit passes, and loyalty cards . As a low-level tool, it allows users with compatible NFC-enabled Android devices to read, write, clone, and analyze the data stored on these tags. While newer versions exist, the 2.3.1 iteration is recognized for its stable, core functionality, making it a staple for developers and security enthusiasts looking to understand or test the security of 13.56 MHz cards.
For readers seeking a deeper understanding, here are some technical details about MCT 2.3.1 and the MIFARE Classic protocol.
Mifare Classic Tool 2.3.1不仅仅是一款APP，它更是探究RFID物理世界的重要启蒙工具。 Raw Data Focus is a specialized Android application
MIFARE Classic Tool (MCT) is the premier Android application for analyzing, reading, and writing MIFARE Classic RFID tags. Version 2.3.1 delivers critical stability updates and optimized NFC controller mapping for modern Android devices. What is MIFARE Classic Tool 2.3.1?
Hold your original tag firmly against your phone's NFC sweet spot. The app will rapidly test the dictionary against all 16 sectors.
The tool provides built-in bits translation, decoding the cryptic access control bits stored inside the Sector Trailers. It converts them into human-readable data matrices showing exactly which keys can execute "read", "write", "increment", or "decrement" commands. 4. Support for Special "Magic" Gen2 Tags For readers seeking a deeper understanding, here are
: Decodes and displays the complex access bits of each sector as a readable table.
MCT operates based on known weaknesses in the Crypto1 cipher and the card's protocol implementation:
. However, its use on systems you do not own may be illegal. Version 2.3.1 continues the project's legacy of providing a free, transparent way to understand the (lack of) security in legacy RFID infrastructure. You can find the official repository and documentation on step-by-step guide
Operating on a 13.56 MHz high-frequency spectrum, the tool completely eliminates the need for expensive desktop hardware like proxmarks or specialized physical readers, utilizing the phone's native Near Field Communication (NFC) chip instead. Core Mechanics of MIFARE Classic Architecture