NFC tag with SE050E

[psvz]

Hi

I need to create a tag - a minimal antenna-to-SE050E design - to do the following.

An app on a mobile device with NFC reader will 1/power the tag; 2/send a string of bytes to sign (about 24 bytes). Then... 3/the signature is read back; 4/the public key verifying the signature is also read back. The algorithm is ECC Ed25519 curve: public key is 32 bytes, and the signature is 64 bytes.

Questions:

1/ Do such tags exist off the shelf to buy - I would imagine it's very basic functionality?

2/ What antenna characteristics I need to use with majority of iphones/androids on the market?

3/ Do you have any middleware to use with NFC readers specifically (I used one written in C for I2C connected SE050E in RPi but not sure if that one would be applicable here).

4/ Do you (or anyone you know of) have examples or SDK for Flutter or JS?

[Kan_Li]

Hi @psvz ,

OM-SE050E-ARD supports ISO14443 interface as well, you may use this board for evaluation purpose. Please kindly refer to https://www.nxp.com/part/OM-SE050ARD-E for details.

Please refer to section 4.4 in https://www.nxp.com/docs/en/application-note/AN12395.pdf for details regarding how to configure the ISo14443 interface .

There are two articles in our NXP community which describe how to use SE050 with CLRC663 and different MCU's. 

Here are them:
1) using LPC55S69: https://community.nxp.com/t5/NFC-Knowledge-Base/Using-LPC55S69-with-SE050-and-CLRC663plus-for-Secure... 
2) using i.MXRT1050: https://community.nxp.com/t5/NFC-Knowledge-Base/Using-i-MXRT1050-with-SE050-and-CLRC663plus-for-Secu... 

Hope that helps,

Have a great day,
Kan

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