Towards Supporting Security and Privacy for Social IoT Applications: A Network Virtualization Perspective

Algorithm 3

Evaluation of related nodes.

Input: SFC request;

  ;

  bool direction;

  X:   ;

Output: the node which has the minimum value of ;

Temp =

int i= 0;

  if  direction is true

i= X-1;

end if

  if  direction is false

i= X+1;

  end if

  for    do

if  

if  && && ;

Compute according to Equation (7);

if  < Temp

Temp = δ;

= ;

end if

end if

end if

  end for

  return  .