Privacy Preservation for Friend-Recommendation Applications

Algorithm 2

Location matching.

is the number of queue which saves the vertexes.

is the number of vertexes in the subdistrict.

Input:

: ’s information;

: ’s information;

Output: true or false

;

: fordo

fordo

fordo

ifthen

;

;

end

end

end

end

ifthen

return ;

end

else

return

end