Data transfer encryption - is it determined by the characteristic or the type of connection?

[William Geng]

Assume I have a device running on nRF52840, and two different versions of mobile apps that will attempt to read one of it's characteristics

One version of the app will have a non-bonded connection

The other version will have a bonded connection in the hope to have some encryption during data transfer.

If I set the characteristic as not requiring a bonded read, would it still have encryption when read by the bonded connection? or should I duplicate the characteristic with different security requirement?

[Amanda Hsieh]

Hi William,

If I set the characteristic as not requiring a bonded read, would it still have encryption when read by the bonded connection?

When you bond with encryption, the connection will be encrypted including reading the characteristic. 

-Amanda H.