OpenSSL

OpenSSL is a robust, commercial-grade, and full-featured toolkit for the Transport Layer Security (TLS) and Secure Sockets Layer (SSL) protocols.

#!/bin/bash

echo "Welcome, let's encrypt a file"

echo "Enter the exact file name with extension (if any)"

read file;

echo "Enter file name for output"

read ofile

openssl des3 -salt -in $file -out $ofile

echo "Your file has been encrypted "

rm $file

#!/bin/bash

echo "Welcome, let's decrypt a file"

echo "Enter the exact file name with extension (if any)"

read file;

echo "Enter the exact file name for output"

read ofile;

openssl des3 -d -salt -in $file -out $ofile

echo "Your file has been decrypted and written to" $ofile

rm $file