Encrypt pdf using pdftk

pdftkEncryptScript.sh

#!/bin/bash
read -p 'Input file name : ' input
read -p 'Input file name : ' output
read -s -p 'Input Secured Password : ' pass

echo ""
echo "trying to fine file in current folder"
pdftk ./$input input_pw encrypt output ./$output.pdf user_pw prateek owner_pw $pass encrypt_128bit compress flatten

echo ""
echo "trying to find file in absolute path"
pdftk "$input" input_pw encrypt output "$output.pdf" user_pw prateek owner_pw $pass encrypt_128bit compress flatten

echo ""
read -p 'press enter to: '