I have been looking at the PN532 chip to create my own reader and have been playing around with Mifare Classic cards. I am wanting to move onto something which does not have the security issues that are present in Mifare Classic. I have read the Mifare DESFire and Mifare Plus are more secure alternatives but are not protocols supported by the PN532 chip. What is a good way to go about developing a reader for these protocols? Does there exist a chip like the PN532 for these?