Base64 talk encrypted

Hi all, why most of computer engineers choose Linux as their preferred os. Friends we get lot of advantages here like we can talk encrypted

For encryption
$ echo -n hi | base64
output: aGk=
For decryption
echo -n aGk= | base64 -d
output: hi

Not only this you can also encrypt image with the following command
$ echo -n $(cat image.jpg) | base64 > inputfile
To decrypt use
$ echo -n $(cat inputfile) | base64 -d