id	keyword
cana-4947	data
cana-4947	cloud
cana-4947	key
cana-4947	cryptosystem
cana-4947	user
cana-4947	encryption
cana-4947	elgamal
cana-4947	security
cana-4947	storage
cana-4947	vol
cana-4947	multi
cana-4947	mod