How to auth the ntag413 dna

[yangyouyong]

I have tried to use utrust 3700 reader read ntag413dna , and get the log file.
But what is the ntag413 auth flow?

Command APDU : 00A4040C07D276000085010100
Response APDU : 9000
Command APDU : 9071000005000300000000
Response APDU : 75E2DA223E5E44DFB3D3E1A16F8DC52891AF
Command APDU : 90AF000020CBD93EB396E6DC2457BA91100BDA2873AC30AFADEDD3BA4F394D1232F3E6EAE100
Response APDU : C2E85B709EF8165980AA0BAB8C1AD2CDAA14658AC8A57519AACBA2198DBF83989100

[ukcas]

Hello Yang,

This message was posted in wrong Topic. It is an NFC question.

9100 is an ISO7816-4 a Status word in "C2E85B709EF8165980AA0BAB8C1AD2CDAA14658AC8A57519AACBA2198DBF83989100". Tells you that Authentication was successful. You Need to calculate Session Keys, TI, CmdCounter on the Reader side now. Please use reference: https://www.nxp.com/docs/en/application-note/AN12196.pdf.

Also consider to migrate to NTAG 424 DNA which has more Features and it is successor of NTAG 413 DNA.

P.S.: It is strange that you used KeyNo = 0x05, which shall be invalid. Can you provide us NTAG's Response to GetVersion command (90 60 00 00)?