Research on Selection Method of Privacy Parameter

Algorithm 1

Multi-user query.

	Require: the number of user is
	The number of query for each user is
	The query set is
	The interval is
	The database and its global sensitivity is
	The privacy budget is
	Ensure: the set of answer for queries
(1)	For each user do
(2)	Choose from for user
(3)	Set the user’s noise distribution
(4)	For each query do
(5)	The answer
(6)	End