An improved system and approaches for exchanging secured files (e.g., documents) between internal users of an organization and external users are disclosed. A file security system of the organization operates to protect the files of the organization and thus prevents or limits external users from accessing...http://www.google.ca/patents/US8176334?utm_source=gb-gplus-sharePatent US8176334 - Document security system that permits external users to gain access to secured files
