https://devzone.nordicsemi.com/f/nordic-q-a/126656/migrating-from-v2-9-0-to-v3-1-1---ble-mesh-cryptoHello! I&#39;m working on a project that was primarily developed with NCS v2.9.0. The application (using an nRF5340) utilizes BLE mesh and is configured to use TinyCrypt for mesh crypto operations. In migrating to NCS v3.1.1 I noticed that TinyCrypt isen-USTelligent Community 13Sun, 16 Aug 2026 03:46:59 GMThttps://devzone.nordicsemi.com/thread/570288?ContentTypeID=1Sun, 16 Aug 2026 03:46:59 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0150c5ef-4eec-41e8-bf08-acfbd1112e19Jeremy0123<p>Migrating cryptographic keys without breaking network state is always tricky, requiring custom migration routines to avoid forced resets. Just like handling base network protocols, studying <!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><a class="ng-star-inserted" href="https://trustee.io/academy/what-are-gas-fees/" rel="noopener noreferrer" target="_blank" data-hveid="0" data-ved="0CAAQ_4QMahgKEwjR_f_J-6OWAxUAAAAAHQAAAAAQzgI">https://trustee.io/academy/what-are-gas-fees/</a><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----> gives great insight into how underlying cryptographic verification impacts overall system efficiency. Proper key handling keeps your deployment stable.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/559508?ContentTypeID=1Sun, 25 Jan 2026 17:48:00 GMT137ad170-7792-4731-bb38-c0d22fbe4515:07c2d98e-b7ee-4c8c-b676-bf648edd0a4bSusheel Nuguru<p>No worries, I missed it too. Thanks for our mesh expert colleague to point us to this.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/559485?ContentTypeID=1Fri, 23 Jan 2026 18:41:47 GMT137ad170-7792-4731-bb38-c0d22fbe4515:cc4e2f6b-3fe4-4a0e-ae85-1714fa3f488eAmira R.<p>Oh! Totally missed that in the migration guide. Thanks so much!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/559466?ContentTypeID=1Fri, 23 Jan 2026 13:08:47 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6f655cf9-8e68-4af7-a161-d81f4b1537a2Susheel Nuguru<p>This information is already provided in the migration guide: <a title="https://docs.nordicsemi.com/bundle/ncs-latest/page/nrf/releases_and_maturity/migration/migration_guide_3.0.html#bluetooth_mesh" href="https://docs.nordicsemi.com/bundle/ncs-latest/page/nrf/releases_and_maturity/migration/migration_guide_3.0.html#bluetooth_mesh">https://docs.nordicsemi.com/bundle/ncs-latest/page/nrf/releases_and_maturity/migration/migration_guide</a>&nbsp;and subsequently here: <a title="https://docs.nordicsemi.com/bundle/ncs-3.0.0/page/nrf/protocols/bt/bt_mesh/configuring.html#security_toolbox" href="https://docs.nordicsemi.com/bundle/ncs-3.0.0/page/nrf/protocols/bt/bt_mesh/configuring.html#security_toolbox" rel="noopener noreferrer" target="_blank">https://docs.nordicsemi.com/bundle/ncs-3.0.0/page/nrf/protocols/bt/bt_mesh/configuring.html#securit…</a></p> <p>&nbsp;You will need to activate &#39;CONFIG_BT_MESH_KEY_IMPORTER&#39; for automatic migration. Please test this well on the desk before pushing the updated binary to remote nodes.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/559408?ContentTypeID=1Thu, 22 Jan 2026 20:04:59 GMT137ad170-7792-4731-bb38-c0d22fbe4515:efe25a32-f7ab-4eb4-a50f-3442a65bc3f7Susheel Nuguru<p>Hi Amira,&nbsp;</p> <p>I need to get assistance on this from the Mesh team, I havent worked with TinyCrypt before. I will be back to you with their opinion by Monday.&nbsp;</p><div style="clear:both;"></div>