I have never had a similar request in my 20 years at the firm, however one of the senior partners wants to distribute a confidential document to other senior partners. He needs to prevent printing, saving, copying, screen shots, and forwarding.
IManage (our DMS) does not include this functionality but found several third party solutions including but not limited to LockLizard, FileOpen, and DIgify.
Based upon preliminary review, LockLizard appears to provide the best functionality, and while the firm likely would have no problem purchasing a one year subscription, this situation could a "one off," and we may never need this solution again. I submit spending $6K for a one off situation is excessive.
I doubt any solution will prevent using your iPhone to take photos of the pages while they are being displayed, but I will explain that risk when I submit potential solutions.
Looking for perhaps a cloud based solution that sells the service on a per-document and / or per-originator basis.
Any recommendations would be appreciated.