I-D Action: draft-freeman-plasma-requirements-08.txt

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	Title           : Requirements for Message Access Control
	Author(s)       : Trevor Freeman
                          Jim Schaad
                          Patrick Patterson
	Filename        : draft-freeman-plasma-requirements-08.txt
	Pages           : 62
	Date            : 2013-10-21

Abstract:
   There are many situations where organizations want to protect
   information with robust access control, either for implementation of
   intellectual property right protections, enforcement of contractual
   confidentiality agreements or because of legal regulations.  The
   Enhanced Security Services (ESS) for S/MIME defines an access control
   mechanism for email which is enforced by the recipient's client after
   decryption of the message. The ESS mechanism therefore is dependent
   on the correct access policy configuration of every recipient's
   client. This mechanism also provides full access to the data to all
   recipients prior to the access control check, which is considered to
   be inadequate for robust access control due to the difficulty in
   demonstrating policy compliance.

   This document lays out the deficiencies of the current ESS security
   label, and presents requirements for a new model for providing access
   control to messages where the access check is performed prior to
   message content decryption. This new model also does not require
   policy configuration on the client thereby simplifying deployment and
   compliance verification.

   The proposed model additionally provides a method where non-X.509
   certificate credentials can be used for encryption/decryption of
   S/MIME messages.

   The name Plasma was assigned to this effort as part of the IETF
   process. It is derived from PoLicy enhAnced Secure eMAil.



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