I am testing the particle server，from the instruction I know it is a must to save the device 's public key into a folder called - core_keys for later hand-shaking. I have a few questions about the keys no matter for the photon or core.
- can the public and private key stored in the device change sometimes or not ?
- and in the server production, should the public keys of all devices all ready being preloaded into the server side, how would you load so many keys in advance ?
- is it a normal practice to store the keys into a folder or it is just for the sake of easy implementation, I wonder if the server has to manage tens of thousand of keys, use the folder to store the keys would be less efficient, are you storing these keys into database in real practice ?