Dear Khietisak Khaipho,
Hope you are doing great, as you may know the information regardin the DESFire family, is secured under NDA ( Non Disclosure Agreement) this means that all the information, tools and support should be delivered using secured communication channels and only to customers with active NDA. if you already have NDA please register in Docstore using your NDA number and request the documentation about DESFire, if you do not have NDA and you are interested in one pelase contact your closest distributor in order to sign one and then be able to register in Docstore.
Have a great day !
BR
Jonathan
