Regarding aes CCM and edch related examples

[Priyadharshini]

Hi,

  I am currently working on the ble mesh project. I would like to know whether there is any cybersecurity related examples in SDK .

   1. Can you list out some of the security based examples (related to pairing,bonding, encryption)available in sdk17.02.

  nrf kit : 52832

  Encryption algorithm:aes CCM

  Provisioning algorithm while using nrf mesh app:edch

  2. Also tell me the security requirements while using Nordic kit.

 3. Can you please give me the difference between aes CCM and edch. Because I am little confused which algorithm I need to use for security procedure.

 4.Topics related to cybersecurity in Nordic website

 

  

[Priyadharshini]

Hi,

  Thanks for the clear information.I would like to about the security related examples in main SDK 17.02.

  I would like to compile examples related to

  1. Pairing

  2.bonding

  3. Aes CCM ,aes aar based examples in ble SDK.

  Is there any ble example in nrf5 main SDK which composes the features all together.

[Hung Bui]

Hi, 
Pairing and bonding are almost the same process, the only difference is that with pairing, the LTK (long term key) is not generated/reused like with bonding. So with pairing, the pairing process will need to be executed every time the connection is established/reconnected. 

You can find the example of bonding and pairing in any of our example, for example ble_app_proximity, or ble_app_gls (with passkey).

The actual encryption is handled inside the softdevice so you don't need to handle that. 

Please let us know what exactly you want to do or if you have a particular question. 

If you want to study how the pairing and encryption work I would suggest ot have a look at the spec, for example Chapter 2 Security Manager in Vol 3 Part H Bluetooth Core Specification v5.2 :

Phase 2 (page 1696):