Mifare Classic Tool 2.3.1 -

For version 2.3.1 to perform a full sector dump on a 1K or 4K card, you need a stable signal. Most phone antennas are too small. Experienced users pair MCT with:

The relevance of MCT 2.3.1 is a direct consequence of NXP Semiconductors’ design flaw in the MIFARE Classic (MF1ICS50). The CRYPTO1 cipher, though robust against brute force attacks in 1994, is susceptible to a keystream recovery attack. MCT 2.3.1 automates this vulnerability by requesting the card to encrypt known plaintext (e.g., a zero-block). When the card returns the ciphertext, the XOR differential reveals the keystream, effectively breaking the sector’s security. This version is particularly dangerous because it removes the technical barrier to entry; a security guard, a disgruntled tenant, or a curious student with a $2 NFC tag can now execute attacks that once required a Proxmark III, a $300 device. mifare classic tool 2.3.1

Since MCT is open-source and free, it can be obtained via the following methods: For version 2

Fingerprints (SHA-256): Verify the signature of the APK if downloading manually. (Checksums are usually found on the official GitHub release page). Fingerprints (SHA-256): Verify the signature of the APK