topic NTag21x signature verification. in NXP Designs https://community.nxp.com/t5/NXP-Designs/NTag21x-signature-verification/m-p/924780#M27 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P></P><P>I work for a company called Spinnaker International, we are UK based. Our website is as follows:-</P><P><A class="link-titled" href="https://www.spinnaker.co.uk/" title="https://www.spinnaker.co.uk/">Secure Innovation | Spinnaker International Ltd</A>&nbsp;</P><P></P><P>I have been accepted by the NXP docstore NDA procedure and I have been able to download AN11350. I am only interested in the signature verification function of&nbsp;NTag21x tags. I am using a Microchip PIC24FJ128GB204 microcontroller, I can get the AN11350 8 bit libraries to compile in my 16 bit IDE but I cannot get the ECDSA verify function to give the correct reply even though I am giving it the correct input. Could you please help?</P><P></P><P>Kind regards,</P><P>Rob Davidson.</P></BODY></HTML> Wed, 16 Oct 2019 09:52:32 GMT rob_davidson 2019-10-16T09:52:32Z NTag21x signature verification. https://community.nxp.com/t5/NXP-Designs/NTag21x-signature-verification/m-p/924780#M27 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P></P><P>I work for a company called Spinnaker International, we are UK based. Our website is as follows:-</P><P><A class="link-titled" href="https://www.spinnaker.co.uk/" title="https://www.spinnaker.co.uk/">Secure Innovation | Spinnaker International Ltd</A>&nbsp;</P><P></P><P>I have been accepted by the NXP docstore NDA procedure and I have been able to download AN11350. I am only interested in the signature verification function of&nbsp;NTag21x tags. I am using a Microchip PIC24FJ128GB204 microcontroller, I can get the AN11350 8 bit libraries to compile in my 16 bit IDE but I cannot get the ECDSA verify function to give the correct reply even though I am giving it the correct input. Could you please help?</P><P></P><P>Kind regards,</P><P>Rob Davidson.</P></BODY></HTML> Wed, 16 Oct 2019 09:52:32 GMT https://community.nxp.com/t5/NXP-Designs/NTag21x-signature-verification/m-p/924780#M27 rob_davidson 2019-10-16T09:52:32Z Re: NTag21x signature verification. https://community.nxp.com/t5/NXP-Designs/NTag21x-signature-verification/m-p/924781#M28 <HTML><HEAD></HEAD><BODY><P>Hello,</P><P></P><P>As mentioned in the case,<SPAN>&nbsp;we do not have any way to test it for your specific MCU, we recommend to please follow the instructions in the App Note minutely.</SPAN></P><DIV style="color: #000000; font-size: medium;"><SPAN style="font-size: small;">&nbsp;</SPAN></DIV><DIV><SPAN>BR,</SPAN></DIV><DIV><SPAN>Ivan.</SPAN></DIV></BODY></HTML> Mon, 21 Oct 2019 21:34:42 GMT https://community.nxp.com/t5/NXP-Designs/NTag21x-signature-verification/m-p/924781#M28 IvanRuiz 2019-10-21T21:34:42Z