MIFARE Classic Tool (MCT) is highly regarded by power users for being a straightforward, open-source Android utility for reading, writing, and analyzing MIFARE Classic RFID tags. While the current stable versions have advanced to 4.3.x, the core 2.3.1 era established the app's reputation for its reliable dictionary-attack key management and raw hex data manipulation. Why Users Rate It Highly
Dictionary Key Management: Users appreciate that it doesn't require knowing every key; it uses "key files" (dictionaries) to automatically authenticate sectors.
True Cloning Capabilities: It can create exact clones of tags, provided you use special "magic" tags that allow writing to the typically read-only manufacturer block (Sector 0).
No Fluff: Experts on platforms like GitHub and F-Droid value its technical transparency—there are no fancy GUIs, just raw hexadecimal access for precise control.
Community Trust: Being open-source ensures no hidden trackers or malicious code, which is critical for a tool interacting with security-sensitive hardware. Common User Feedback
While the app is a staple for RFID hobbyists, community reviews often highlight specific technical hurdles:
Watch a demonstration of how the tool interacts with MIFARE Classic 1K cards to verify data and test copying capabilities: MIFARE Classic 1K 13.56 MHz Card Copy Test YouTube• Mar 15, 2023 Critical Technical Limits
No Cracking: The app itself cannot "hack" or brute-force unknown keys due to Android's slow NFC protocol; you must provide the keys via a dictionary file.
Hardware Compatibility: Writing to Sector 0 requires "Gen2" or specific "magic" tags; standard original tags are hardware-locked and cannot be modified even with this tool.
Device Support: Not all Android phones have NFC chips capable of interacting with MIFARE Classic technology (some manufacturers, like Google in newer Pixels, have removed the necessary support).
Are you looking to clone a specific card, or do you need help setting up a custom key dictionary for a new tag?
Older versions of Mifare Classic Tool - MCT (Android) | Uptodown
What is Mifare Classic Tool 2.3.1?
Mifare Classic Tool 2.3.1 is a free, open-source software designed to work with Mifare Classic RFID cards. It allows users to read, write, and manipulate data stored on these cards. The tool is widely used by security researchers, developers, and enthusiasts to analyze and understand the inner workings of Mifare Classic cards.
Key Features
User Interface
The user interface of Mifare Classic Tool 2.3.1 is divided into several sections:
Advanced Features
Use Cases
Best Practices and Precautions
By following this guide, you'll gain a deeper understanding of Mifare Classic Tool 2.3.1 and its capabilities. Remember to use the tool responsibly and with caution to avoid any potential issues.
MIFARE Classic Tool (MCT) , particularly version , is a specialized Android application designed for low-level interaction with MIFARE Classic RFID tags. While newer versions like 4.3.1 now exist, version 2.3.1 remains a significant milestone in the tool's history, often sought for its compatibility with older Android architectures or specific legacy devices. Google Play Core Capabilities of MCT 2.3.1
This open-source tool allows users to read, write, and analyze the data stored on 13.56 MHz high-frequency RFID tags. Its primary functions include: Data Reading & Analysis
: Users can read tag data using "key files" or dictionaries to authenticate against different sectors. The app displays this information in various formats, such as highlighted hex or 7-Bit US-ASCII. Tag Cloning
: MCT can perform "dump-wise" writing, effectively cloning the contents of one tag onto another, provided the target is a special rewritable tag (like a "Magic" card). Key Management
: It features a dictionary-based authentication system. Users can create, edit, and share key files to attempt access to protected sectors without knowing all keys beforehand. Technical Information
: The tool can identify and display generic tag information such as UID, SAK, ATQA, and memory size. Technical Constraints and Use Cases
MCT is intended for users with basic familiarity with MIFARE Classic technology. It is crucial to note its limitations: Google Play Hardware Dependency
: The app's functionality depends entirely on the device's NFC controller. Some modern smartphones do not support MIFARE Classic due to hardware restrictions. No Cracking Capability
: MCT cannot "crack" or "hack" keys through brute force, as the protocol is too slow for such methods. Access requires valid keys derived from external tools like a or other specialized software. Legacy Support
: Version 2.3.1 is specifically compatible with Android 4.3 and up, making it a "stable" choice for older hardware that might struggle with the latest updates. Ethical and Legal Considerations Older versions of Mifare Classic Tool - MCT (Android) 29 Jan 2026 — mifare classic tool 2.3.1
MIFARE Classic Tool (MCT) is a specialized Android application designed for low-level interaction with MIFARE Classic RFID tags. While newer versions like 4.3.1 are currently available on platforms like Google Play and F-Droid, many users specifically seek version 2.3.1 or similar legacy builds for compatibility with older Android hardware or specific firmware environments. Core Features of MIFARE Classic Tool
MCT allows users to perform various tasks that standard NFC apps cannot, provided they have the correct encryption keys for the target tag:
Reading and Analyzing: Users can read the entire memory of a MIFARE Classic tag and save the data as a "dump" file.
Dictionary-Based Key Attacks: The app uses key files (dictionaries) to try and authenticate with tags. If a key is found in the dictionary, MCT can read that specific sector.
Tag Cloning: You can write a saved dump file onto a new tag, effectively creating a 1:1 clone. This often requires special "Magic Cards" (CUID/UID-changeable tags) to write to the normally read-only Manufacturer Block (Sector 0).
Access Condition Decoding: The tool includes a decoder to help users understand the complex "Access Bits" that control which keys (A or B) can read or write specific blocks.
Value Block Manipulation: It can encode and decode "Value Blocks," which are often used for electronic purses or credit-based systems like public transport cards. Understanding the 2.3.1 Context
Legacy versions like 2.3.1 represent a point in the app's development before major Android API shifts. Users often prefer specific older versions if they encounter issues with: MIFARE Classic Tool Tutorial — Complete Beginner Guide
MCT 2.3.1 operates through the Android OS’s NFC stack, interfacing directly with ISO/IEC 14443 Type A tags. Unlike its predecessors, version 2.3.1 incorporates refined error handling and extended key diversification algorithms. The software’s core capabilities are threefold: mapping (enumerating sectors and blocks on a card), reading (extracting encrypted data from sectors when a valid key is provided), and writing (cloning data to UID-writable tags). A significant addition in this version is the integrated nested authentication attack. This exploit leverages the linear feedback shift register (LFSR) vulnerability in the CRYPTO1 cipher. By capturing a successful authentication with one known key, MCT 2.3.1 can reverse-engineer other sector keys of the same card within seconds, a process that would take weeks using brute force on legacy hardware.
While MCT is powerful, it is bound
MIFARE Classic Tool (MCT) version 2.3.1 is an open-source Android application designed for low-level interaction with MIFARE Classic RFID tags. Released around October 2020, this version serves as a stable point in the tool's history for reading, writing, and analyzing tags using a device's built-in NFC controller. Core Features of MCT 2.3.1
The tool is built for users with basic technical knowledge of MIFARE Classic technology. Its primary capabilities include:
Reading & Analysis: Users can read data from MIFARE Classic 1K or 4K tags and display it in highlighted hex or ASCII formats.
Key Management: The app uses a dictionary-attack approach. Users can create and edit key files (dictionaries) to authenticate against sectors; version 2.3.1 includes standard and extended-std key files containing common default keys.
Cloning & Writing: It allows for block-wise writing and full tag cloning (writing a "dump" of one tag to another). Specialized Tools: MIFARE Classic Tool (MCT) is highly regarded by
Tag Formatting: Reverts tags to their factory delivery state.
Manufacturer Block Writing: Can write to "Block 0" of special "magic" tags (UID changeable tags).
Access Condition Decoder: Decodes and displays the complex access bits of each sector as a readable table.
Value Block Support: Decodes, encodes, and manipulates MIFARE Classic value blocks (often used for credit/counters). Technical Requirements
To use MCT 2.3.1, specific hardware and software conditions must be met: Operating System: Requires Android 4.3 or newer.
Hardware Support: The phone's NFC controller must support the MIFARE Classic protocol. Many modern devices (like some Google Pixel or newer Samsung models) do not support this protocol despite having NFC.
Input Format: All data input and output is in hexadecimal; there is no simplified "point-and-click" interface for saving custom URLs or text. Key Limitations
No Cracking: MCT cannot crack unknown keys directly on the phone. Keys must be known or found in the dictionary. Tools like Proxmark3 are typically used for initial key extraction.
No Brute-Force: The protocol is too slow to support brute-forcing keys through the app.
Data Risks: Uninstalling the app permanently deletes all saved dump and key files. Getting Started with 2.3.1
Source: Official builds are typically hosted on GitHub or F-Droid.
Setup: After installation, select "Read Tag" from the main menu and choose the standard key file to see if the tag can be mapped with default keys.
Writing: To clone a card, first "Read Tag" to create a dump, then use "Write Dump" to transfer that data to a compatible blank tag. MIFARE Classic Tool (MCT) - GitHub
MIFARE Classic is a legacy technology with known security vulnerabilities.