Is there way to encrypt Magento FTP/Cpanel Codes so that no one except myself can be able to access it? If there is a way how, I would really appreciate the help. Thank you!
If you use sftp you could setup a ssh key that requires a passphrase from you. An would not be accessible to others.
Cpanel if you have a hosting panel then you should be able to ask your hosting company.
To lock down the cpanel by ip if you use a static ip and you could also ask for ht authentication as well.
Your SFTP should be restricted by IP already so that should help prevent other users from accessing.