LockLizard says the first step towards document security is to ask “what are you trying to achieve?” – be it security when sending a document, or whether more controls are needed once the document has been sent, such as document modification permission and document sharing.
The white paper analyses the three principal approaches used for document security today: encryption, digital rights management (DRM), and collaboration; and how they rely upon each other and where they differ.
Document Security - a Guide to Securing Your Documents can be downloaded at http://www.infosecurity-magazine.com/download/44