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RE: requirements review/plan

From: Krishna Sankar <ksankar@cisco.com>
Date: Wed, 23 Jan 2002 07:19:47 -0800
To: "Mike Just" <Mike.Just@entrust.com>
Cc: "Frederick Hirsch \(E-mail\)" <hirsch@zolera.com>, <www-xkms@w3.org>
RE: requirements review/planHi,

    Comments embedded.

  -----Original Message-----
  From: Mike Just [mailto:Mike.Just@entrust.com]
  Sent: Wednesday, January 23, 2002 6:51 AM
  To: 'Krishna Sankar'
  Cc: Frederick Hirsch (E-mail); 'www-xkms@w3.org'
  Subject: RE: requirements review/plan

  Hi Krishna,

  Can you please clarify some of your comments below?

  -----Original Message-----
  From: Krishna Sankar [mailto:ksankar@cisco.com]
  Sent: Friday, January 18, 2002 12:43 AM
  To: www-xkms@w3.org
  Subject: RE: requirements review/plan


          Some minor points.

  1)      2.1 ... Every client must support *at least* one of *these*

  [MJ] I don't understand which item you're referring to.


      2.2.1 (Security) says  "Every client must support one of the
mechanisms". I assume we mean "at least" and not "at most". If so let us be
clear by saying "Every client must support *at least* one of *these*


  2)      Add : 13. The specification shall explicitly state the visibility
  requirements (of elements), if any, for cases like encryption.

  [MJ] I don't understand what you mean by "visibility requirements". Can
you elaborate?


      This comes from the possibility that messages could be encrypted.
Either we can say that we deal with stuff after the messages are unencrypted
(which could be implied) or iterate a set of elements which should not be
encrypted so that we could make some sense of the message we receive.


  3)      It would be better to define "assertion" in the context of this
  requirement set. For example 3.3. talks about assertions, while 2.7 says
  some assertions are out of scope. It would be precise if we could add a
  requirement in Section 3.1 The specification shall define ... assertion,
  assertion, ...

  [MJ] I see the reference to "Assertion" in 3.3.3, but am not sure what you
mean by "2.7". Are you looking at the latest version at

  Having said this, there was also some confusion regarding the concept of
an "assertion" at the December F2F. I think we actually tried to remove most
references to Assertions.  Do you have specific requirements text that you
can suggest we add?


      I was talking about 2.4.7 and (as you pointed out) 3.3.3. But other
sections like 2.2.7(XTAML Assertion), 2.3.2, 2.3.10 (Public Key Assertion),
3.2.12, 3.3 mentions assertion as well. So the question is, do we deal with
assertion ? If so, do they have the same meaning as SAML ? Of course SAML
does not define Public Key assertion, XTAML assertion et al).

      One possible idea is to remove the notion of assertion from XKMS. Or
another way is to say (I will wordsmith this if we take this route)
"Assertion is ..... XKMS shall define XTAML Assertion, public key
assertion,.....SAML Authentication and authorization assertions are out of
scope ..."



Received on Wednesday, 23 January 2002 10:20:31 UTC

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