https://devzone.nordicsemi.com/f/nordic-q-a/78801/mbedtls-rng-failI am trying to generate ECC key pairs using MbedTLS on Connect SDK. I found this code block on stackoverflow and validated from mbedtls/programs. &quot;mbedtls_ctr_drbg_seed&quot; function returns &quot;-52&quot; because &quot;mbedtls_entropy_func&quot; not working properlyen-USTelligent Community 13Fri, 20 Aug 2021 16:02:56 GMThttps://devzone.nordicsemi.com/thread/326017?ContentTypeID=1Fri, 20 Aug 2021 16:02:56 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ba022b73-7afc-4af0-ba7d-1c2f8a0848aeVidar Berg<p>Hello,</p> <p>Please try to &#39;memset&#39; the mbdetls context struct as suggested in this thread here <a href="https://devzone.nordicsemi.com/f/nordic-q-a/58824/cc310-platform-mutex-init-error">https://devzone.nordicsemi.com/f/nordic-q-a/58824/cc310-platform-mutex-init-error</a>. Hopefully it&#39;s that simple. Also, in case you haven&#39;t noticed, there are several test cases in &lt;ncs&gt;\nrf\tests\crypto\test_cases\ that might be useful as a reference if you are not familiar with the Mbedtls APIs.</p> <p>Best regards,</p> <p>Vidar</p><div style="clear:both;"></div>