ECDSA verify with Optiga Trust Xhttps://devzone.nordicsemi.com/f/nordic-q-a/75836/ecdsa-verify-with-optiga-trust-xHello, I&#39;m using the Infineon Optiga Trust X chip for ECDSA signature verification but I&#39;m having trouble saving the public key. Currently the public key is generated by a remote server and is received by the device via bluetooth but in the code belowen-USTelligent Community 13Tue, 01 Jun 2021 13:44:26 GMTRE: ECDSA verify with Optiga Trust Xhttps://devzone.nordicsemi.com/thread/312908?ContentTypeID=1Tue, 01 Jun 2021 13:44:26 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ab4e5301-c221-47b7-928a-7fdfb8e2f2e3Kenneth<p>I am not familiar with this, but I assume it fails in&nbsp;nrf_crypto_ecc_public_key_calculate() where:</p> <p><pre class="ui-code" data-mode="text"> // Check and prepare parameters result = nrf_crypto_internal_ecc_key_input_check( p_private_key_header, NRF_CRYPTO_INTERNAL_ECC_PRIVATE_KEY_INIT_VALUE);</pre></p> <p>The actual check in&nbsp;nrf_crypto_internal_ecc_key_input_check() is:</p> <p><pre class="ui-code" data-mode="text"> // Check init value VERIFY_TRUE(p_key_header-&gt;init_value == init_value, NRF_ERROR_CRYPTO_ECC_KEY_NOT_INITIALIZED);</pre></p> <p>It should be possible to breakpoint here and find the difference, e.g.&nbsp;NRF_CRYPTO_INTERNAL_ECC_PRIVATE_KEY_INIT_VALUE is not set.</p> <p>Kenneth</p><div style="clear:both;"></div>