Do users have to be connected to the Internet in order to view my secure PDF documents?
No. You can allow secure PDF documents to be viewed off-line. All document controls (preventing copying, printing, etc.) are retained within the document itself and therefore no Internet connection is required to enforce controls. Please bear in mind however that an initial connection to the Internet is required to validate the user license and obtain the appropriate decryption key(s) when users view your protected PDF documents for the first time (unless of course PDF documents are protected as part of a publication and then users only need to connect once to obtain the publication decryption key).
