Currently I have some NXP MIFARE DESFire EV1 and EV2 RFID cards around to play with. The default stuff (ISO commands) works but I only discovered the commands by reverse engineering public available libraries. The official "datasheet" (or like NXP calls it: "short data sheet") is just a product flyer without any intel. To receive the real datasheet, I have to register with NXP DocStore. However the agents there always rejecting my registration due to I am an private individual and not a company and so on. So I got really angry with NXP and decided to not use their products anymore. No other company act the way NXP does to me. For example to receive NDA documents by TI or ST, you just download the NDA form from the homepage, sign it, scan it, and upload it. One hour after that, you receive the confirmation and can access the NDA downloads. NXP however seems to be focused to much on big players and misses opportunities with small companies and makers. Anyway... I would like to address the following question to those, who have experience with secure RFID chip cards: What are the alternatives to NXP MIFARE DESFire RFID cards? Especially I need the following features: * at least 4k (protected storage) version, but 8k would be more convenient * multiple (at least 8) applications per card * individual read/write/config keys per each individual application * AES encrypted tunnels (authentication and data channels) between card and terminal * broadly "audited" by the community (tried but not successful hacked/cloned the card) * NOT an NXP chip, so I can get real datasheets on which I can start developing applications.