Why lock documents to specific devices, countries, IPs?
Locking Documents for IPR control
Although one of the primary requirements in PDF DRM (Digital Rights Management) is to identify the authorized user of a document, and make sure that only that person can use protected documents, it is relatively difficult to identify people, and although the IT industry has been working on improving the well out of date ID/Password combination, it is still in common use for flexibility of operation when better tools are available. Read more