Mifare Classic 1k consist of 16 Sectors (4 Blocks each)
Each Block consist of 16 Bytes (16 Ascii Characters)
- Gray cell is Manufacturer Block which is also where Card UID (Unique Identifier) is stored.
- -UID consist for 4 Bytes
- Yellow cells are Programmable block where you can read/write Information or Value.
- Red cells are Security block where your passwords for Key A and Key B is stored.