The MIFARE Classic® 1K is a contactless smart card IC developed by NXP Semiconductors, operating at 13.56 MHz and compliant with ISO/IEC 14443 Type A. It is widely used in applications such as public transportation, access control, and electronic toll collection.
 
Key Technical Specifications:
 
 - Memory: 1 KB EEPROM, organized into 16 sectors of 4 blocks each (one block = 16 bytes).
  - Communication Speed: Up to 106 kbit/s.
  - Security Features: 
 - Mutual three-pass authentication (ISO/IEC DIS 9798-2).
  - Two keys per sector for multi-application support.
  - CRYPTO1 encryption algorithm for secure data transmission.
  
   - UID Options: Available with 7-byte unique identifier (UID) or 4-byte non-unique identifier (NUID).
  - Operating Distance: Up to 100 mm, depending on antenna geometry and reader configuration.
  - Data Retention: 10 years.
  - Write Endurance: 200,000 cycles.
  
 For a more detailed breakdown, you can check the official MIFARE Classic EV1 1K datasheet