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For the theoretical basis, please refer to the PPT of the foreign god: DEFCON-20-Lee-NFC Hacking. I would like to outline the available solutions and functions to be implemented. Test only, do not imitate. Core principles With the help of the CM9 rom version in February 2012, the new nfc read-write tag function can realize software card simulation. (None of the previous versions, The official version of Google has not opened this function. At present, Google has opened other nfc apis for card simulation since Android 5.0. Recently, similar apis have been added to WeChat applet, but I haven't found the actual one yet read the whole passage