Algorithm 2 Dynamic context matching algorithm.

Input  Context $DynamicContext,PrivacyContext$ Output  The closest $pc$ of the API call Begin  $similarity=0$  $result=null$  for all $pc\in PrivacyContext$ do   if $pc.api==DynamicContext.api$ then    $simTemp=Similarity(DynamicContext.stack,pc.context)$ //Calculate similarity    if $similarity<simTemp$ then     $similarity=simTemp$     $result=pc$// Update result    else if $similarity==simTemp$ then     $result.add\left(pc\right)$// Add result    end if   end if  end for  return $result$