Creating a safe DFU bootloaderhttps://devzone.nordicsemi.com/f/nordic-q-a/7227/creating-a-safe-dfu-bootloaderI am trying to figure out a way to secure my DFU (via BLE) such that someone cannot sniff the and copy my hex code (and decompile). I cannot use Pairing or Bonding as that doesn&#39;t work for our usecase. So I need to a way to encrypt my hex image in a wayen-USTelligent Community 13Thu, 04 Jun 2015 11:45:37 GMTRE: Creating a safe DFU bootloaderhttps://devzone.nordicsemi.com/thread/25518?ContentTypeID=1Thu, 04 Jun 2015 11:45:37 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f6d51929-0018-4852-845f-f2f3a12d3f03Hung Bui<p>@Dave: I believe <a href="https://devzone.nordicsemi.com/question/31119/nrf51822-aes-hw-module-clarification/?answer=31127#post-id-31127">this answer from Clem Taylor</a> answerred your question. If you use CFB mode, you should be able to use the same ECB encryption (with no decryption) to do AES. You can have a look <a href="http://en.wikipedia.org/wiki/Block_cipher_mode_of_operation">here</a>.</p><div style="clear:both;"></div>RE: Creating a safe DFU bootloaderhttps://devzone.nordicsemi.com/thread/25517?ContentTypeID=1Tue, 02 Jun 2015 18:44:16 GMT137ad170-7792-4731-bb38-c0d22fbe4515:04b680a3-d999-4623-94e7-71c23f0e2b74Dave_couling<p>Unfortunately, the links provided have not helped me determine a solution.</p><div style="clear:both;"></div>RE: Creating a safe DFU bootloaderhttps://devzone.nordicsemi.com/thread/25516?ContentTypeID=1Fri, 29 May 2015 08:55:46 GMT137ad170-7792-4731-bb38-c0d22fbe4515:152c489c-7ce6-49ad-8a7f-7a0e5b53ca8bHung Bui<p>@Dave: Did the reply from cocoa answer your question? If it does please accept it and we can close the case :)</p><div style="clear:both;"></div>RE: Creating a safe DFU bootloaderhttps://devzone.nordicsemi.com/thread/25519?ContentTypeID=1Sat, 23 May 2015 07:37:27 GMT137ad170-7792-4731-bb38-c0d22fbe4515:888bc316-bf47-4866-aea3-8e205f9da687cocoa<p>Hi,</p> <p>see this <a href="https://devzone.nordicsemi.com/question/33513/how-to-decrypt-aes-ecb-nopadding-data/?answer=33580#post-id-33580">post</a> and <a href="https://devzone.nordicsemi.com/question/31119/nrf51822-aes-hw-module-clarification/?answer=31127#post-id-31127">this</a> .</p> <p>-c</p><div style="clear:both;"></div>