https://devzone.nordicsemi.com/f/nordic-q-a/55945/no-definition-for-aes-api-s-at-nrf52840Hi, Everyone My development environment is sdk15.3, nRF52840, Keil complier The link error file is attached below. Also I am going to use AES-CBC method. Which example should I reference? Please advise. Alexen-USTelligent Community 13Sat, 28 Dec 2019 06:58:12 GMThttps://devzone.nordicsemi.com/thread/226984?ContentTypeID=1Sat, 28 Dec 2019 06:58:12 GMT137ad170-7792-4731-bb38-c0d22fbe4515:36651029-c89d-4f26-9725-444d792079caalex kim<p>Hi, Vidar</p> <pre class="tw-data-text tw-text-large tw-ta" dir="ltr"><span lang="en">Thank you for your answer.<br /></span></pre> <pre class="tw-data-text tw-text-large tw-ta" id="tw-target-text" dir="ltr"><span lang="en">I added .lib as you advised I also added the necessary files from the example you talked about. A build was successful.<br /><br />Best regards,<br /><br />Alex</span></pre> <pre class="tw-data-text tw-text-large tw-ta" id="tw-target-text" dir="ltr"><span lang="en">&nbsp;</span></pre><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/226947?ContentTypeID=1Fri, 27 Dec 2019 14:51:49 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c3743c24-8829-460f-bd96-58235c3040d2Vidar Berg<p>Hi Alex,&nbsp;</p> <p>Did you remember to include the cc310 runtime library? You can use the examples located in&nbsp;\examples\crypto\nrf_crypto\aes as reference.</p> <p>Best regards,</p> <p>Vidar</p><div style="clear:both;"></div>