A Privacy-Preserving Trajectory Publication Method Based on Secure Start-Points and End-Points

Algorithm 3

Accessibility correction algorithm.

	Input: uncorrected trajectory , Position transfer threshold V, user’s trajectory dataset U;
	Output: dummy trajectory that meets the requirements
(1)	;
(2)	for i  1 to length () do
(3)	if
(4)	count++;
(5)	end if
(6)	end for
(7)	if
(8)	for i  1 to mark do
(9)	;
(10)	end for
(11)	for i  mark to length () do
(12)	;
(13)	end for
(14)	for i  1 to length () do
(15)	if
(16)	count++;
(17)	end if
(18)	end for
(19)	if
(20)	Delete and back to Algorithm 2
(21)	end if
(22)	else
(23)	return
(24)	end if