ISSUE:[UC-12-01:Encryption] (was RE: Comments on Straw Man 2: Protection of message contents)

[Irving Reid <Irving.Reid@baltimore.com>]

This clearly can't be ready for ballot before the F2F, but I thought I'd
respond to Darren's suggestion. What follows is my modified suggestion for
issue ballot text:


ISSUE:[UC-12-01:Encryption] UC-9-02:PrivacyStatement addresses the
importance of sharing data only as needed between security zones (from
asserting party to relying party). However, it is also important that data
not be available to third parties, such as snoopers or untrusted
intermediaries.

One possible solution for implementors is to use secure channels between
relying party and asserting party. Another is to use encryption, either with
a shared secret or with public keys.

Possible Resolutions: 

1) Include an allowance for explicit use of encryption, such as XML
Encryption (http://www.w3.org/Encryption/2001/), within SAML messages. SAML
messages could then be transferred securely on any protocol. 
2) Specify security properties in the Bindings documents. Each binding must
include a description of how the privacy and integrity of SAML messages can
be protected within that binding. Examples: S/MIME for MIME, HTTP/S for
HTTP.