You may want to use a password with your Paperless library, so that the library (and its contents) can only be viewed by entering the password.
For steps to encrypt a Paperless library, see this knowledge base article.
For more information on library encryption, see this knowledge base article.
Please be sure to make a note of the password you choose--if you lose or forget a password we unfortunately will not be able to help you recover information from your encrypted library.