I-D Action: draft-freeman-plasma-requirements-11.txt

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        Title           : Requirements for Message Access Control
        Authors         : Trevor Freeman
                          Jim Schaad
                          Patrick Patterson
	Filename        : draft-freeman-plasma-requirements-11.txt
	Pages           : 49
	Date            : 2015-03-08

Abstract:
  S/MIME delivers confidentiality, integrity, and data origination
  authentication for email. However, there are many situations where
  organizations also want robust access control applied to information
  in messages. The Enhanced Security Services (ESS) RFC5035 for S/MIME
  defines an access control mechanism for email, but the  access check
  happens after the data is decrypted by the recipient which devalues
  the protection afforded by the cryptography and provides very weak
  guarantees of policy compliance. Another major issues for S/MIME is
  its dependency on a single type of identity credential, an X.509
  certificate. Many users on the Internet today do not have X.509
  certificates and therefore cannot use S/MIME.  Furthermore, the
  requirement to discover the X.509 certificate for every recipient of
  an encrypted message by the sender has proven to be an unreliable
  process for a number of reasons.

  This document presents requirements for an alternative model to ESS to
  address the identified issues with access control in order to deliver
  more robust compliance for S/MIME protected messages. This document
  describes an access control model which uses cryptographic keys to
  enforce access control policy decisions where the policy check is
  performed prior to the decryption of the message contents. This
  authorization model can be instantiated using many existing standards
  and is in not intended to be a one off just for email, being
  applicable to other data types.

  This document also presents requirements for the abstraction of the
  specifics of the authentication technologies used by S/MIME users. The
  abstraction makes it possible for other forms of authentication
  credentials to be used with S/MIME thereby enabling much broader
  adoption. The authentication abstraction model also removes the
  dependency on the need to discover encryption keys by the sender. This
  abstraction can be used independently from access control to enable
  simple scenarios where authentication of the recipient is sufficient
  to grant access to the message.

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


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-freeman-plasma-requirements/

There's also a htmlized version available at:
http://tools.ietf.org/html/draft-freeman-plasma-requirements-11

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http://www.ietf.org/rfcdiff?url2=draft-freeman-plasma-requirements-11


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