Is a file encrypted before it is sent to miners?
go-filecoin client will run standard symmetric key encryption (AES) by default on all client data sent to the network.
How to manage the key? All users use same key? or unique key for every file?
To be clear, data is not encrypted at rest in the miners. Clients are responsible for encryption and any other preprocessing of data to be stored.
In case that clients are reponsible for ecnryption, how deduplication works?
Without deduplication, how to compete with AWS?