Comparable Encryption Scheme over Encrypted Cloud Data in Internet of Everything

Algorithm 1

The sliding window method [32].

Input: two numbers and where represents base and represents exponent

 Output:   

 for  all    do

Compute and store ;

   is divided into zero windows and non-zero windows of length

where represents the length of windows;

 for    do

Compute the value of ;

  for    do

Compute and store ;

  if    then

Compute and store ;

else

is a zero window.

 Return ;