In response to a request from a content server to forward an encrypted
document to a recipient user, a forwarding engine in the content server
prepares an e-mail message that contains a link to the document publisher
and an identifier for the document. Upon receiving the e-mail, the
recipient user can log onto a content server in the publisher and the
publisher content server resolves the link, downloads a secure viewer
program and an encrypted version of the requested document to the viewer
program. Subsequently, the secure viewer program requests a decryption
key for the encrypted document and decrypts the document. The recipient
user can then view the document content in secure viewer but cannot copy
or print the document without permission from the publisher.