https://devzone.nordicsemi.com/f/nordic-q-a/46870/why-use-sd_ecb_block_encrypt-vs-nrf_ecb_cryptThere are two APIs in SDK 14.2 to access the nrf52832&#39;s AES core. What&#39;s the difference in behavior between the two? I noticed that nrf_ecb_crypt() has a useful return value and sd_ecb_block_encrypt() does not. Does this mean that sd_ecb_block_encrypten-USTelligent Community 13Mon, 06 May 2019 18:45:20 GMThttps://devzone.nordicsemi.com/thread/185570?ContentTypeID=1Mon, 06 May 2019 18:45:20 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ea8a09eb-190a-4163-80d2-c63e07f37de9Kenneth<p>Because it will not fail.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/185561?ContentTypeID=1Mon, 06 May 2019 17:11:18 GMT137ad170-7792-4731-bb38-c0d22fbe4515:7f658a7a-51a5-482b-9fdd-7904a49a3ffcElias<p>Okay, this does clarify things. Why does <span>sd_ecb_block_encrypt</span>() only have a &quot;success&quot; return value?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/185385?ContentTypeID=1Mon, 06 May 2019 09:06:35 GMT137ad170-7792-4731-bb38-c0d22fbe4515:91dd3aad-f95b-42f9-82d8-9103fe05d398Kenneth<p>Hi, there are two api calls depending on whether the softdevice is enabled or not:<br /><a href="https://infocenter.nordicsemi.com/topic/sds_s132/SDS/s1xx/sd_resource_reqs/hw_block_interrupt_vector.html">https://infocenter.nordicsemi.com/topic/sds_s132/SDS/s1xx/sd_resource_reqs/hw_block_interrupt_vector.html</a>&nbsp;</p> <p>The implementation in the softdevice api call should in general provide the same functionality as if the application have direct access, but the return code and actual implementation may differ.</p><div style="clear:both;"></div>