公开(公告)号：US06519700B1

公开(公告)日：2003-02-11

申请号：US09178529

申请日：1998-10-23

Applicant: Prasad Ram ,  Thanh T. Ta ,  Xin Wang

Inventor： Prasad Ram ,  Thanh T. Ta ,  Xin Wang

IPC: C06F1216

CPC classification number: G06F21/6209 ,  G06F21/10 ,  G06F2221/0733 ,  G06F2221/0737 ,  G06F2221/0755 ,  G06F2221/2141 ,  G06F2221/2151

Abstract: A system and method for the secure distribution of electronic documents reduces the likelihood of unauthorized reproduction and redistribution by either authorized or unauthorized recipients. A self-protecting document (SPD) contains an encrypted document as well as a secure set of permissions and the software necessary to process the document; full decryption of the document is performed as late as possible so as to minimize the possibility of intercepting the document before it has been fully rendered to screen or to paper.