Secure advertising packets

[pltv]

Whats the best way to secure my advertising packets such that others cannot make sense out of it?

Do we encrypt the packet data so that it is gibberish, random and not in any particular format so others cannot make sense of it?

[Ole Bauck]

You can encrypt the data in the packet by following the steps in this blogpost (you should read the whole blogpost as it has many good points).

You should also use private resolvable address if you don't want unknown scanners to be able to track your device, see here.