MF Plus SE 1K Blank Access RFID Card is the only mainstream smart card family compatible with MF 1K and MF 4K that offers pre-issuance of cards prior to making security upgrades in the infrastructure. After security upgrade to Security Level 3, MF Plus uses Advanced Encryption Standard (AES) for authentication, data integrity, and encryption .Plus SE Card is the choice for customers who want to switch to higher security while preparing for the future by introducing cards, ready for AES security, into the existing system environment. It has 4-Byte NUID and 7-Byte NUID for options base on customers ' applications .