pdf protection with user and password
php,pdf,password-protection,copy-protection
You can't achieve what you want with PDF. There are two ways to encrypt a PDF document: Using passwords. You can define two passwords: a user password and an owner password. A document that is encrypted with an owner password can be opened by every one who receives the document....
How to protect source code in electron project
There is no official way to copy-protect your code at the moment, sorry - if you want to do this, you'll have to invent your own way (or just not worry about it)