Mifare DESFire EV1 4K (FlexDF) RFID Access Card

The MIFARE DESFire EV1 4K card from NXP operates at 13.56 MHz wireless frequency, according to the ISO 14443A standard with the transport protocol complying to the ISO 14443-4 standard. It features a 4K byte non volatile memory, a high speed triple-DES data encryption co-processor, a flexible memory organization structure, a mutual 3-pass authentication technique together with a true random number generator and an anti-tear mechanism to guarantee data integrity during contactless transactions.These are the 4K version of the chips used in the FlexDF